Epidemiología y caracterización molecular de las miopatías genéticas en adultos en una región del sureste de España / Epidemiology and molecular characterization of adult genetic myopathies in a southeastern region of Spain

Introducción Las miopatías genéticas constituyen un conjunto de enfermedades raras que impactan significativamente en la funcionalidad y la calidad de vida del paciente. Un diagnóstico temprano de las miopatías genéticas puede prevenir complicaciones futuras y proporcionar a las familias asesoramiento genético. A pesar del impacto sustancial de las miopatías genéticas en población adulta, la epidemiología global de estos trastornos está inadecuadamente abordada en la bibliografía.ObjetivosMejorar el entendimiento tanto de la epidemiología como de la genética de estos trastornos en la provincia de Alicante, situada en el sureste de España. Material y métodos. Entre 2020 y 2022, se llevó a cabo un estudio observacional prospectivo en el área de salud Alicante-Hospital General, que incluyó a pacientes de 16 años o más con sospecha de miopatías genéticas. Se recopilaron datos sociodemográficos, clínicos y genéticos. La fecha de referencia para el cálculo de la prevalencia se estableció el 31 de diciembre de 2022. Se utilizaron datos demográficos oficiales del área de salud para establecer la población en riesgo.ResultadosEn total, se identificó a 83 pacientes con miopatía genéticamente confirmada, lo que dio lugar a una prevalencia total de 29,59 casos por cada 100.000 habitantes. El rendimiento diagnóstico de las pruebas genéticas moleculares fue del 69,16%. Las miopatías genéticas más frecuentes incluyeron la distrofia miotónica (27,5%), las distrofinopatías (15,7%) y la distrofia facioescapulohumeral (15,7%).ConclusiónLa prevalencia de las miopatías genéticas puede variar considerablemente dependiendo de la región geográfica y la población estudiada. El análisis del rendimiento diagnóstico sugiere que los estudios genéticos deberían considerarse útiles en el diagnóstico de las miopatías genéticas. (AU)

Introduction. Genetic myopathies constitute a collection of rare diseases that significantly impact patient functionality and quality of life. Early diagnosis of genetic myopathies can prevent future complications and provide families with genetic counselling. Despite the substantial impact of genetic myopathies on the adult population, the global epidemiology of these disorders is inadequately addressed in the literature.Aims. To enhance understanding of both the epidemiology and genetics of these disorders within the province of Alicante, situated in southeastern Spain.Material and methods. Between 2020 and 2022, a prospective observational study was conducted at the Alicante Health Area-General Hospital, enrolling patients aged 16 years or older with suspected genetic myopathies. Sociodemographic, clinical, and genetic data were collected. The reference date for prevalence calculation was established as December 31, 2022. Official demographic data of the health area were used to set the population at risk.Results. In total, 83 patients were identified with confirmed genetically related myopathy, resulting in an overall prevalence of 29.59 cases per 100,000 inhabitants. The diagnostic yield for molecular genetic testing was found to be 69.16%. The most prevalent genetic myopathies identified included myotonic dystrophy (27.5%), dystrophinopathies (15.7%), and facioscapulohumeral dystrophy (15.7%).Conclusion. The prevalence of GMs can vary considerably depending on the geographical region and the studied population. The analysis of diagnostic yield suggests that genetic studies should be considered useful in the diagnosis of genetic myopathies. (AU)

Epidemiology and molecular characterization of adult genetic myopathies in a southeastern region of Spain. / Epidemiología y caracterización molecular de las miopatías genéticas en adultos en una región del sureste de España.

INTRODUCTION: Genetic myopathies constitute a collection of rare diseases that significantly impact patient functionality and quality of life. Early diagnosis of genetic myopathies can prevent future complications and provide families with genetic counselling. Despite the substantial impact of genetic myopathies on the adult population, the global epidemiology of these disorders is inadequately addressed in the literature. AIMS: To enhance understanding of both the epidemiology and genetics of these disorders within the province of Alicante, situated in southeastern Spain. MATERIAL AND METHODS: Between 2020 and 2022, a prospective observational study was conducted at the Alicante Health Area-General Hospital, enrolling patients aged 16 years or older with suspected genetic myopathies. Sociodemographic, clinical, and genetic data were collected. The reference date for prevalence calculation was established as December 31, 2022. Official demographic data of the health area were used to set the population at risk. RESULTS: In total, 83 patients were identified with confirmed genetically related myopathy, resulting in an overall prevalence of 29.59 cases per 100,000 inhabitants. The diagnostic yield for molecular genetic testing was found to be 69.16%. The most prevalent genetic myopathies identified included myotonic dystrophy (27.5%), dystrophinopathies (15.7%), and facioscapulohumeral dystrophy (15.7%). CONCLUSION: The prevalence of GMs can vary considerably depending on the geographical region and the studied population. The analysis of diagnostic yield suggests that genetic studies should be considered useful in the diagnosis of genetic myopathies.

TITLE: Epidemiología y caracterización molecular de las miopatías genéticas en adultos en una región del sureste de España.Introducción. Las miopatías genéticas constituyen un conjunto de enfermedades raras que impactan significativamente en la funcionalidad y la calidad de vida del paciente. Un diagnóstico temprano de las miopatías genéticas puede prevenir complicaciones futuras y proporcionar a las familias asesoramiento genético. A pesar del impacto sustancial de las miopatías genéticas en población adulta, la epidemiología global de estos trastornos está inadecuadamente abordada en la bibliografía. Objetivos. Mejorar el entendimiento tanto de la epidemiología como de la genética de estos trastornos en la provincia de Alicante, situada en el sureste de España. Material y métodos. Entre 2020 y 2022, se llevó a cabo un estudio observacional prospectivo en el área de salud Alicante-Hospital General, que incluyó a pacientes de 16 años o más con sospecha de miopatías genéticas. Se recopilaron datos sociodemográficos, clínicos y genéticos. La fecha de referencia para el cálculo de la prevalencia se estableció el 31 de diciembre de 2022. Se utilizaron datos demográficos oficiales del área de salud para establecer la población en riesgo. Resultados. En total, se identificó a 83 pacientes con miopatía genéticamente confirmada, lo que dio lugar a una prevalencia total de 29,59 casos por cada 100.000 habitantes. El rendimiento diagnóstico de las pruebas genéticas moleculares fue del 69,16%. Las miopatías genéticas más frecuentes incluyeron la distrofia miotónica (27,5%), las distrofinopatías (15,7%) y la distrofia facioescapulohumeral (15,7%). Conclusión. La prevalencia de las miopatías genéticas puede variar considerablemente dependiendo de la región geográfica y la población estudiada. El análisis del rendimiento diagnóstico sugiere que los estudios genéticos deberían considerarse útiles en el diagnóstico de las miopatías genéticas.

[Multifocal encephalitis as a neurological manifestation of COVID-19 infection]. / Encefalitis multifocal como manifestación neurológica de la infección por COVID-19.

TITLE: Encefalitis multifocal como manifestación neurológica de la infección por COVID-19.

[Drug exposure associated with exacerbation of symptoms in patients with myasthenia gravis]. / Exposición a fármacos asociados a agravamiento de síntomas en pacientes con miastenia grave.

INTRODUCTION: Numerous drugs have been related to exacerbation of myasthenia gravis. So far there are no studies examining the extent of use of drugs related to exacerbation of myasthenia gravis. AIMS: We sought to assess the extent of use of drugs related to exacerbations and the annual incidence rate of exacerbations in a cohort of myasthenia gravis patients. We explored possible risk factors of severe exacerbations. PATIENTS AND METHODS: We performed a retrospective cohort study. We included adult patients followed in neurology department. We estimated frequencies, rates and built a recurrent events model. RESULTS: We included 91 patients. 94.51% of patients had at least one prescription of a drug. 51 patients had at least one prescription of a drug contraindicated according to its drug label. 145 exacerbation episodes were reported in 50 patients. The annual incidence rate of exacerbation episodes was 0.35. 48 exacerbations were severe (in 18 patients). The annual incidence rate of severe exacerbation episodes was 0.12. Generalized myasthenia gravis and thymectomy were associated with a higher risk of severe exacerbation episodes. CONCLUSIONS: Our patients were extensive and widespread exposed to drugs during the follow-up period but we did not find and association with severe exacerbation episodes. Just over half of the patients had at least one exacerbation episode during the study period, most of them were mild. Further studies with larger sample sizes are necessary to corroborate these conclusions and to study possible correlations between the use of drugs and the risk of exacerbation episodes.

TITLE: Exposición a fármacos asociados a agravamiento de síntomas en pacientes con miastenia grave.Introducción. Numerosos fármacos se han relacionado con el agravamiento de síntomas en pacientes con miastenia grave, pero hasta la fecha no existen estudios sobre la exposición a fármacos en estos pacientes. Objetivos. Describir el consumo de fármacos y calcular la tasa anual de episodios de exacerbación en una cohorte de pacientes con miastenia grave, y explorar posibles factores de riesgo de exacerbaciones graves. Pacientes y métodos. Estudio observacional longitudinal retrospectivo que incluye a pacientes adultos con miastenia grave seguidos en consulta. Cálculo de frecuencias, tasas y construcción de modelo de eventos repetidos. Resultados. De 91 pacientes incluidos, el 94,51% estuvo expuesto al menos a un fármaco durante el período de estudio (siete años y un mes). De ellos, 51 tuvieron al menos una prescripción de un fármaco contraindicado en la ficha técnica (56,04%). Se contabilizaron 145 exacerbaciones en 50 pacientes. La tasa anual de incidencia fue de 0,35 exacerbaciones por paciente y año. De estas exacerbaciones, 48 fueron graves (en 18 pacientes), con una tasa anual de incidencia de 0,12. Se halló una posible asociación entre diagnóstico de miastenia grave generalizada y timectomía, con un aumento del riesgo de episodios de exacerbación graves. Conclusiones. En esta cohorte se encontró una amplia exposición a fármacos, pero no asociación con el riesgo de episodios de exacerbación graves. Algo más de la mitad de pacientes tuvo al menos un episodio de exacerbación durante el período de estudio, la mayoría leves. Son necesarios estudios que corroboren estas conclusiones y puedan estudiar posibles correlaciones entre fármacos y el riesgo de episodios de exacerbación.

El fenómeno de la inmigración en la Europa comunitaria y su impacto en la asistencia neurológica en el área de la Marina Baixa, Alicante / The phenomenon of immigration within the european community and its impact on neurological care in the Marina Baixa Area, Alicante

Introducción. La inmigración configura un nuevo modelo de sociedad, con nuevas necesidades y demandas, cuya caracterización debe orientar las políticas de salud. Objetivo. Conocer la repercusión del fenómeno de la inmigración sobre la asistencia neurológica extrahospitalaria llevada a cabo en el Departamento 16 de la Agencia Valenciana de Salud y cómo influye en la consulta la dificultad idiomática. Pacientes y métodos. Estudio prospectivo durante 26 consultas ambulatorias consecutivas en el primer trimestre de 2006. Resultados. El 9,5% de los pacientes atendidos era extranjero. El 77,7% pertenecía a países comunitarios. De los extracomunitarios, el 13% provenía de países latinoamericanos, el 5% de países europeos no comunitarios y el 5% de África. Las edades medias fueron 61,5 años para el grupo de europeos comunitarios y 42,6 años para el resto de nacionalidades. Los motivos de consulta principales fueron la cefalea y el deterioro cognitivo. A menor calidad de comunicación, mayor era la duración de la consulta. Conclusiones. La alta prevalencia de población inmigrante comunitaria, mayoritariamente de edad avanzada y con patología neurológica crónica, contribuye, junto con el envejecimiento de la población autóctona, al progresivo crecimiento de la demanda asistencial en nuestra área. La barrera idiomática complica la práctica clínica y conlleva un aumento del tiempo necesario por paciente. Estos hechos han de tenerse en cuenta a la hora de planificar tanto los recursos sanitarios de nuestra área como los tiempos de consulta por paciente (AU)

Introduction. Immigration is shaping a new model of society, with new needs and demands, whose characteristics must guide health-care policies. Aim. To determine the repercussions of the phenomenon of immigration on the extra-hospital neurological care carried out in Department 16 of the Agencia Valenciana de Salud (Valencian Health Service) and how language problems affect visits. Patients and methods. We conducted a prospective study during 26 consecutive outpatientvisits in the first three months of 2006. Results. Of all the patients who were attended, 9.5% were foreigners. Of these, 77.7% came from EU countries. And of those from outside the Community, 13% were from Latin American countries, 5% came from European countries that do not belong to the EU and 5% were from Africa. Mean ages were 61.5 years for the EU group and 42.6 years for the other nationalities. The main reasons for visiting were headache and cognitive impairment. The poorer the quality of communication was, the longer the visit lasted. Conclusions. The high prevalence of immigrants from the EU, mostly elderly persons and with chronic neurological pathologies, together with the ageing of the autochthonous population, have led to a progressive growth in the demand for health care in our area. The language barrier makes clinical practice more complicated and results in an increase in the time needed for each patient. These facts must be taken into account when planning both the health care resources in our area and visiting times per patient (AU)

[The phenomenon of immigration within the European Community and its impact on neurological care in the Marina Baixa area, Alicante]. / El fenómeno de la inmigración en la Europa comunitaria y su impacto en la asistencia neurológica en el área de la Marina Baixa, Alicante.

INTRODUCTION: Immigration is shaping a new model of society, with new needs and demands, whose characteristics must guide health-care policies. AIM. To determine the repercussions of the phenomenon of immigration on the extra-hospital neurological care carried out in Department 16 of the Agencia Valenciana de Salud (Valencian Health Service) and how language problems affect visits. PATIENTS AND METHODS: We conducted a prospective study during 26 consecutive outpatient visits in the first three months of 2006. RESULTS: Of all the patients who were attended, 9.5% were foreigners. Of these, 77.7% came from EU countries. And of those from outside the Community, 13% were from Latin American countries, 5% came from European countries that do not belong to the EU and 5% were from Africa. Mean ages were 61.5 years for the EU group and 42.6 years for the other nationalities. The main reasons for visiting were headache and cognitive impairment. The poorer the quality of communication was, the longer the visit lasted. CONCLUSIONS: The high prevalence of immigrants from the EU, mostly elderly persons and with chronic neurological pathologies, together with the ageing of the autochthonous population, have led to a progressive growth in the demand for health care in our area. The language barrier makes clinical practice more complicated and results in an increase in the time needed for each patient. These facts must be taken into account when planning both the health care resources in our area and visiting times per patient.

Iontophoresis of dexamethasone phosphate: competition with chloride ions.

The objective was to study the competition of chloride released from a Ag/AgCl cathode on the iontophoretic delivery of dexamethasone phosphate (Dex-Phos). Iontophoresis of Dex-Phos was performed in side-by-side diffusion cells (0.78 cm(2)) using pig skin. A 0.3 mA constant current was applied via Ag/AgCl electrodes. The amounts of Dex-Phos and dexamethasone (Dex) were also quantified in the stratum corneum (SC), using tape-stripping, after passive and iontophoretic delivery. The profiles of Dex-Phos and Dex, as a function of position in the SC, were deduced. The iontophoretic delivery of Dex-Phos from pure water was unaffected by the accumulation of Cl- released by the donor cathode when the drug's concentration was 4.25 mM to 17 mM. At 0.85 mM, however, Cl- competition was significant and the drug flux was significantly reduced. Formulation of the drug in the presence of Cl- resulted in a non-linear dependence of flux on the molar fraction of the drug. Tape-stripping experiments confirmed the enhanced delivery of Dex-Phos by iontophoresis relative to passive diffusion, with Dex-Phos concentration greater inside the barrier post-iontophoresis than that in the donor. The latter observation could explain the robustness of Dex-Phos delivery to the presence of Cl- in the donor solution.

Mononeuropatía múltiple asociada a tratamiento con pravastatina / Multiple mononeuropathy associated to treatment with pravastatin

Introducción. La neuropatía secundaria al tratamiento con estatinas se conoce desde 1994. aunque es una complicación poco frecuente. Habitualmente se trata de una polineuropatía axonal, predominantemente sensitiva, distal y simétrica, subaguda o crónica. Presentamos el segundo caso que se recoge en la bibliografía de mononeuritis múltiple asociada al uso de estatinas. Caso clínico. Mujer de 51 años que, tras iniciar tratamiento con pravastatina, presentó parestesias progresivas distales en miembros, de distribución asimétrica, con inestabilidad en la marcha. El estudio electromiográfico fue compatible con mononeuritis múltiple. Las pruebas complementarias realizadas para descartar otras causas de mononeuropatía múltiple fueron normales. La enferma mejoró al abandonar el tratamiento y empeoró de nuevo tras retomarlo. Con la suspensión definitiva de la pravastatina volvió a mejorar de forma progresiva hasta quedar prácticamente asintomática. Conclusiones. La relación entre el tratamiento con estatinas y la aparición de polineuropatía ha quedado establecida en distintos estudios epidemiológicos de casos y controles. No sólo se puede presentar como la clásica polineuropatía distal y simétrica, sino que se han descrito formas clínicas atípicas, incluido algún caso como el nuestro de mononeuropatía múltiple. El riesgo de desarrollar esta complicación es pequeño y se ve compensado por los beneficios cardiovasculares de las estatinas, aunque posiblemente en un futuro se verá con más frecuencia, dado el uso creciente de estos fármacos. Es importante tener en cuenta esta causa de neuropatía, dada su reversibilidad potencial

Introduction. The first reports of neuropathy due to treatment with statins appeared in 1994, although it is an infrequent complication. It usually consists of an axonal polyneuropathy, which is predominantly sensory, distal and symmetric, and may be subacute or chronic. We present here the second case reported in the literature of multiple mononeuropathy associated to the use of statins. Case report. A 51-year-old female patient who, after beginning therapy with pravastatin, presented with progressive, asymmetrically distributed, distal paresthesias in the limbs and an unstable gait. An electromyographic study was compatible with multiple mononeuritis. Results of complementary tests that were carried out to preclude other causes of multiple mononeuropathy were normal. The patient’s condition improved on withdrawing treatment with the drug and it became worse again when therapy was restarted. When pravastatin therapy was stopped for good, the patient's condition progressively improved until she was practically free of symptoms. Conclusions. The relationship between treatment with statins and the appearance of polyneuropathy has been proved in different epidemiological case-control studies. It does not only appear as the classical distal symmetrical olyneuropathy, but has also been reported as taking on atypical clinical forms including a few cases, like ours, of multiple mononeuropathy. The risk of developing this complication is low and is offset by the cardiovascular benefits offered by statins, although it may become more common in the future due to the increasing rate of use of these agents. It is important to bear this cause of neuropathy in mind, given the fact that it is potentially reversible

[Multiple mononeuropathy associated to treatment with pravastatin]. / Mononeuropatía múltiple asociada a tratamiento con pravastatina.

INTRODUCTION: The first reports of neuropathy due to treatment with statins appeared in 1994, although it is an infrequent complication. It usually consists of an axonal polyneuropathy, which is predominantly sensory, distal and symmetric, and may be subacute or chronic. We present here the second case reported in the literature of multiple mononeuropathy associated to the use of statins. CASE REPORT: A 51-year-old female patient who, after beginning therapy with pravastatin, presented with progressive, asymmetrically distributed, distal paresthesias in the limbs and an unstable gait. An electromyographic study was compatible with multiple mononeuritis. Results of complementary tests that were carried out to preclude other causes of multiple mononeuropathy were normal. The patient's condition improved on withdrawing treatment with the drug and it became worse again when therapy was restarted. When pravastatin therapy was stopped for good, the patient's condition progressively improved until she was practically free of symptoms. CONCLUSIONS: The relationship between treatment with statins and the appearance of polyneuropathy has been proved in different epidemiological case-control studies. It does not only appear as the classical distal symmetrical polyneuropathy, but has also been reported as taking on atypical clinical forms including a few cases, like ours, of multiple mononeuropathy. The risk of developing this complication is low and is offset by the cardiovascular benefits offered by statins, although it may become more common in the future due to the increasing rate of use of these agents. It is important to bear this cause of neuropathy in mind, given the fact that it is potentially reversible.

[Ambulatory neurological care in the Marina Baixa area, Alicante]. / Asistencia neurológica ambulatoria en el área de la Marina Baixa, Alicante.

INTRODUCTION: The demand for neurological care depends on the type of population to be attended, among other variables. The Marina Baixa area, which includes towns such as Altea and Benidorm, has its own peculiar characteristics due to its being one of the places that is often chosen by pensioners from northern and central Spain and Europe to set up residence. AIM: The aim of this study was to determine the characteristics of the ambulatory neurological care in our health area. PATIENTS AND METHODS: Data on 1,000 patients attended in the Neurological Clinic at the Specialty Centre in Benidorm (age, sex, reason for visit, tests requested and destination on discharge) were recorded prospectively and consecutively. RESULTS: The mean age was 58.04 years (range 14-94) and 56.4% were females. 25% of the patients attended were over 75 years old. The main reasons for visiting were headache (28.2%) and cognitive impairment (21%). 26.5% were first-time visits, with a mean age of 55.02 years, which is significantly lower than that of the review patients (59.12 years; p = 0.003). 15.6% of the patients were discharged from hospital. A prolonged follow-up was foreseen for over 50% of them. The demand for care in 2003 was 27.5 per 1,000 inhabitants/year in the population above the age of 14 years. CONCLUSIONS: The higher the mean age of the population is, the greater the prevalence of neurodegenerative diseases will become and the more demand there will be for ambulatory care. Resources must be adjusted to this new situation and there is also a need to adopt the most suitable model of health care for chronic neurological patients.

Asistencia neurológica ambulatoria en el área de la Marina Baixa, Alicante / Ambulatory neurological care in the marina baixa area, Alicante

Introducción. La demanda asistencial neurológica depende, entre otras variables, del tipo de población atendida. El área de la Marina Baixa, que incluye poblaciones como Altea y Benidorm, presenta características propias debido a que es uno de los lugares de residencia frecuentemente elegidos por jubilados del norte y centro de España y de Europa. Objetivo. Conocer las características de la asistencia neurológica ambulatoria en nuestra área sanitaria. Pacientes y métodos. Se han registrado de forma prospectiva y consecutiva los datos de 1.000 pacientes atendidos en la Consulta de Neurología del Centro de Especialidades de Benidorm (edad, sexo, motivo de consulta, pruebas solicitadas y destino al alta). Resultados. La edad media fue de 58,04 años (rango: 14-94). El 56,4 por ciento se trataba de mujeres. El 25 por ciento de los pacientes atendidos tenía más de 75 años. Los motivos de consulta principales fueron la cefalea (28,2 por ciento) y el deterioro cognitivo (21 por ciento). El 26,5 por ciento correspondió a primeras visitas, con una edad media de 55,02 años, significativamente menor a la de los pacientes de revisión (59,12 años; p = 0,003). El 15,6 por ciento de los pacientes fue dado de alta. En más del 50 por ciento se preveía que iban a precisar un seguimiento prolongado. La demanda asistencial en 2003 fue de 27,5 por 1.000 habitantes/año en la población mayor de 14 años. Conclusión. El aumento de la edad media de la población determina una mayor prevalencia de las enfermedades neurodegenerativas y un aumento de la demanda ambulatoria. Es necesario ajustar los recursos a esta nueva realidad y abordar el modelo asistencial más adecuado para el paciente neurológico crónico (AU)

Introduction. The demand for neurological care depends on the type of population to be attended, among other variables. The Marina Baixa area, which includes towns such as Altea and Benidorm, has its own peculiar characteristics due to its being one of the places that is often chosen by pensioners from northern and central Spain and Europe to set up residence. Aims. The aim of this study was to determine the characteristics of the ambulatory neurological care in our health area. Patients and methods. Data on 1,000 patients attended in the Neurological Clinic at the Specialty Centre in Benidorm (age, sex, reason for visit, tests requested and destination on discharge) were recorded prospectively and consecutively. Results. The mean age was 58.04 years (range 14-94) and 56.4% were females. 25% of the patients attended were over 75 years old. The main reasons for visiting were headache (28.2%) and cognitive impairment (21%). 26.5% were first-time visits, with a mean age of 55.02 years, which is significantly lower than that of the review patients (59.12 years; p = 0.003). 15.6% of the patients were discharged from hospital. A prolonged follow-up was foreseen for over 50% of them. The demand for care in 2003 was 27.5 per 1,000 inhabitants/year in the population above the age of 14 years. Conclusions. The higher the mean age of the population is, the greater the prevalence of neurodegenerative diseases will become and the more demand there will be for ambulatory care. Resources must be adjusted to this new situation and there is also a need to adopt the most suitable model of health care for chronic neurological patients (AU)

[Evaluation of hemodynamic parameters by transcranial Doppler in patients with leukoaraiosis]. / Estudio de los parámetros hemodinámicos en pacientes con leucoaraiosis mediante Doppler transcraneal.

INTRODUCTION: Leukoaraiosis is commonly found in neuroimaging in ancient people. The pathogenic theory that most suitably explains its origin is the vascular one, mainly linked to cerebral hemodynamic abnormalities. The techniques most frequently used in cerebral hemodynamic evaluation (PET and SPECT) are expensive and not widespread. Transcranial Doppler instead is cheaper and much more widespread. OBJECTIVE: Our aim has been to show whether transcranial Doppler is a useful tool for cerebral hemodynamic evaluation in leukoaraiosis. PATIENTS AND METHODS: We have prospectively included 116 patients aged 60-90 who came to the Neurology department with unspecific complaints such as dizziness or mild headache. Patients with recent history of stroke or moderate to severe cognitive impairment were excluded. RESULTS: Mean age was 74.4 +/- 6.3 years old. The prevalence of leukoaraiosis was 68.7%. Leukoaraiosis was significantly correlated with older age, lacunar infarctions, past history of stroke, cognitive impairment and to lower systolic and diastolic velocities in middle cerebral artery (MCA) and higher pulsatility index. Multivariate analysis only retained the lower diastolic velocity in MCA in the model. CONCLUSIONS: Transcranial Doppler can detect hemodynamic abnormalities in patients with leukoaraiosis and is therefore a very useful technique for the evaluation of this entity.

Estudio de los parámetros hemodinámicos en pacientes con leucoaraiosis mediante Doppler transcraneal / Evaluation of hemodynamic parameters by transcranial dopler in patients with leukoaraiosis

Introducción. La leucoaraiosis es un hallazgo frecuente en la neuroimagen de individuos ancianos. La teoría patogénica más defendida para explicar su origen es la hipótesis vascular, principalmente las alteraciones de la hemodinámica sanguínea cerebral. Las técnicas empleadas para el estudio hemodinámico (PET y SPECT) presentan un alto coste y escasa accesibilidad. Frente a ellas, el Doppler transcraneal (DTC) es una técnica más barata y accesible. Objetivos. Demostrar la utilidad del DTC como técnica válida para estudiar las alteraciones hemodinámicas en la leucoaraiosis. Pacientes y métodos. Se han estudiado prospectivamente 116 pacientes de entre 60 y 90 años, seleccionados en la consulta de Neurología del Hospital General Universitario de Alicante por mostrar una clínica inespecífica, como sensación de inestabilidad o cefalea. Excluimos a los pacientes con antecedentes recientes de ictus o déficit cognitivo moderado a grave. Resultados. La edad media fue de 74,4 ñ 6,3 años. La prevalencia de leucoaraiosis fue de un 68,7 por ciento. La leucoaraiosis se asociaba significativamente a mayor edad, infartos lacunares, antecedentes de ictus, deterioro cognitivo, menor velocidad sistólica (VS) y diastólica (VD) en la arteria cerebral media (ACM) e índices de pulsatilidad más altos. Los pacientes con leucoaraiosis tenían significativamente menor VD en la ACM, independientemente de los otros factores mencionados en el análisis multivariable. Conclusiones. El DTC es capaz de detectar las alteraciones hemodinámicas que aparecen en los pacientes con leucoaraiosis. Esto lo convierte en una herramienta muy útil en el estudio de esta entidad (AU)

Introduction. Leukoaraiosis is commonly found in neuroimaging in ancient people. The pathogenic theory that most suitably explains its origin is the vascular one, mainly linked to cerebral hemodynamic abnormalities. The techniques most frequently used in cerebral hemodynamic evaluation (PET and SPECT) are expensive and not widespread. Transcranial Doppler instead is cheaper and much more widespread. Objective. Our aim has been to show whether transcranial Doppler is a useful tool for cerebral hemodynamic evaluation in leukoaraiosis. Patients and methods. We have prospectively included 116 patients aged 60-90 who CAME to the Neurology department with unspecific complaints such as dizziness or mild headache. Patients with recent history of stroke or moderate to severe cognitive impairment were excluded. Results. Mean age was 74.4±6.3 years-old. The prevalence of leukoaraiosis was 68.7%. Leukoaraiosis was significantly correlated with older age, lacunar infarctions, past history off stroke, cognitive impairment and to lower systolic and diastolic velocities in middle cerebral artery (MCA) and higher pulsatility index. Multuvariant analysis only retained the lower diastolic velocity in MCA in the model. Conclusions. Transcranial Doppler can detect hemodynamic abnormalities in patients with leukoaraiosis and is therefore a very useful technique for the evaluation of this entity (AU)

[A control and case study of multiple sclerosis in the Alicante and Villajoyosa areas]. / Estudio de casos y controles sobre la esclerosis múltiple en las áreas de Alicante y Villajoyosa.

INTRODUCTION: Three studies have been carried out in the area of Alcoy (Spain) which show an association between contact with dogs and multiple sclerosis. We present a control and case study conducted in a different geographical area, the area of Alicante. AIMS. To examine environmental factors linked with multiple sclerosis in the health care district of Alicante, and to compare findings with those from the health care district of Alcoy. PATIENTS AND METHODS: A study of cases and controls was conducted with 47 patients, each of which was paired with four controls according to gender, age and place of residence. All the cases fulfilled criteria of defined multiple sclerosis. The controls were obtained from the Emergency and Casualty Services at different hospitals in the area. Each of the environmental factors studied was stratified by genders. RESULTS: A total of 47 patients and 188 controls were analysed. A statistically significant association was found between the disease and smoking, a low educational level, a social level 2 on the classification developed by Koch Henriksen, having had measles before the age of 15 and contact with dogs. The fact of being the third, or later, child in a family and a family history of cephalea were more frequent among controls than among cases. CONCLUSIONS: Multiple sclerosis in the Alicante area is related with contact with dogs, smoking, a low educational level, a high social level and measles before the age of 15. Since an association between contact with dogs and multiple sclerosis has been shown repeatedly in other previous studies conducted in the town of Alcoy, we are now in a position to state that this factor is indeed linked with the appearance of multiple sclerosis.

[The epidemiology of multiples sclerosis in Alcoi. Analytical data]. / Epidemiología de la esclerosis múltiple en Alcoi. Datos analíticos.

INTRODUCTION: The epidemiology of multiple sclerosis (ME) in the Alcoi area has been studied by our groups for many years. When studying the factors linked to ME in this area initially we observed that migration, contact with dogs and the textile industry were associated with the disorder. A later study, in which the migration factor was controlled, still showed a significant association with contact with dogs and the textile industry. OBJECTIVE: To make an analytical study avoiding the possible confusing effect of contact with the textile industry, since this may be associated with other factors. We also compared the results of previous studies. PATIENTS AND METHODS: We made a case control study in which each case was paired with four controls for age, sex and having worked or not worked in the textile industry. The cases fulfilled the criteria for diagnosis of ME. The control patients came from the Emergency and Trauma Departments of Alcoi hospital. RESULTS. We analyzed 37 patients and 148 controls. Significant values were obtained for smoking, low social class, chickenpox and measles infections when aged under 15 years, pneumonia when aged over 15 years and contact with dogs, sheep and dissolvents. CONCLUSIONS: Contact with dogs was associated with multiple sclerosis in all the studies carried out in the Alcoi area to date. This is therefore a risk factor for the disorder in the Alcoi population.

Estudio de casos y controles sobre la esclerosis múltiple en las áreas de Alicante y Villajoyosa / A control and case study of multiple sclerosis in the Alicante and Villajoyosa areas

Introducción. Existen tres estudios realizados en el área de Alcoy que demuestran una asociación entre el contacto con perros y la esclerosis múltiple. Presentamos un estudio de casos y controles realizado en una zona geográfica distinta, el área de Alicante. Objetivo. Estudiar los factores ambientales asociados a la esclerosis múltiple en el área sanitaria de Alicante, y comparar los hallazgos en esta área con los del área sanitaria de Alcoy. Pacientes y métodos. Se realizó un estudio de casos y controles con 47 pacientes, y se apareó cada uno de ellos con cuatro controles según el sexo, la edad y el lugar de residencia. Todos los casos cumplían criterios de esclerosis múltiple definida. Obtuvimos los controles de los Servicios de Urgencias y Traumatología de varios hospitales del área. Cada uno de los factores ambientales estudiados se estratificó por sexos. Resultados. Se analizaron 47 pacientes y 188 controles. Se encontró asociación estadísticamente significativa de la enfermedad con el consumo de tabaco, el nivel de educación bajo, el nivel social 2 de la clasificación de Koch-Henriksen, haber padecido el sarampión antes de los 15 años y el contacto con perros. El hecho de ser el tercero o más de los hermanos y los antecedentes familiares de cefalea fueron más frecuentes entre los controles que entre los casos. Conclusiones. La esclerosis múltiple en el área de Alicante se relaciona con el contacto con perros, el consumo de tabaco, el nivel de educación bajo, el nivel social alto y el sarampión antes de los 15 años. Al haber demostrado previamente una asociación del contacto con perros y la enfermedad, de forma reiterada, en otros estudios realizados sobre la población de Alcoy, afirmamos que dicho factor se relaciona con la aparición de esclerosis múltiple (AU)

Epidemiología de la esclerosis múltiple en Alcoi. Datos analíticos / The epidemiology of multiples sclerosis in alcoi. Analytical data

Introducción. Nuestro grupo ha estudiado desde hace años la epidemiología de la esclerosis múltiple (EM) en el área de Alcoi. Al estudiar los factores vinculados a la EM en esta área, observamos inicialmente que la migración, el contacto con perros y la industria textil se asociaban a la enfermedad. Un estudio posterior, en el que se controló el factor migración, mostraba todavía una asociación significativa con el contacto con perros y la industria textil. Objetivos. Realizar un estudio analítico y evitar el posible efecto de confusión que pueda ejercer el hecho de tener contacto con la industria textil, por asociarse a otros factores. Comparar los resultados con los de los estudios previos. Pacientes y métodos. Se realizó un estudio caso-control, en el que cada caso se apareó con cuatro controles por edad, sexo y haber trabajado o no en la industria textil. Los casos cumplían criterios de EM definida. Los controles se obtuvieron de los servicios de Urgencias y Traumatología del Hospital de Alcoi. Resultados. Se analizaron 37 pacientes y 148 controles. Se obtuvieron valores significativos para el consumo de tabaco, el grupo social bajo, las infecciones por varicela y sarampión antes de los 15 años, la neumonía después de los 15 años y el contacto con perros, ovejas y disolventes. Conclusiones. El contacto con perros se mantiene asociado a la EM en todos los estudios realizados en el área de Alcoi hasta la fecha. Por tanto, constituye un factor de riesgo para la enfermedad en esta población (AU)

[Atherosclerosis and brain circulation]. / Aterosclerosis y circulación cerebral.

INTRODUCTION: Atherosclerosis affects the vascular system in a diffuse way and its is clearly implicated in some of the most prevalent diseases in western countries such as cerebrovascular and cardiovascular diseases. Knowing more about the underlying pathogenic mechanisms may contribute to a better understanding of this entities and the development of therapies for both its treatment and prevention. DEVELOPMENT: We review herein the concepts included in the term atherosclerosis, the growth of the atheromatous plaque and its complications and the cellular mechanisms which intervene in its development. We analyze how it influences brain hemodynamics and its implication in cerebrovascular ischemic disease paying attention to the dissimilarities with other vascular territories and the clinical syndromes which derive from its development on different vascular structures. CONCLUSIONS: Under the concept of ischemic cerebrovascular disease we can find a group of heterogeneous clinical syndromes, usually associated to different etiopathogenic mechanisms: cardioembolic, atherothrombotic or hemodynamic. Although their risk factors may be common, these processes are clearly different form each other. Therefore including ischemic brain infarctions all together without attending to their etiology may produce important methodological biases when interpreting the results in clinical trials or other studies, and may also be a suitable explanation for differences between authors.

[Analytical epidemiological study of multiple sclerosis in Alcoi]. / Estudio epidemiológico analítico sobre la esclerosis múltiple en Alcoi.

INTRODUCTION: Multiple sclerosis (MS) is a disease of controversial epidemiology, which has frequently been studied. The results of an epidemiological descriptive study in the Alcoi area led to a first case-control study to give information about the factors associated with the illness in this area. It was seen from this that migration, contact with dogs and with cloth might be related to it. OBJECTIVE: To carry out a second analytical study, maintaining the migration factor stable to avoid the possible confounding effect with other associated factors. MATERIAL AND METHODS: For this case-control study we grouped one case with four controls from the population according to age, sex and place of birth. All cases fulfilled criteria defined for MS and the controls were randomly selected from the census. We also classified the cases and controls into three groups, according to whether or not migration was involved (group A: Autochthonous; group B: Immigrants who arrived before the age of 13, and group C: Immigrants who arrived after the age of 13). RESULTS: We analyzed 40 patients and 160 controls. We obtained significant values for 'social group'. The cases belonged to the less favored social group both on overall analysis and in the autochthonous group. Pneumonia was the only infection with significant figures in patients over 15. Contact with dogs gave new statistically significant figures, together with cloth and cloth products. CONCLUSIONS: Persistence of positive correlation of MS with contact with dogs and cloth suggest the possible influence of these two factors in the increase in incidence of MS in this area.