Sistema trigémino vascular y cefalea / Trigeminovascular System and Primary Headache

La fisiopatología de las cefaleas primarias es compleja e incluye un sinnúmerode interacciones que regulan el proceso nociceptivo. Dentro de los principalesresponsables de generar el dolor se encuentra el sistema trigémino vascular, que esun conjunto de estructuras que integran vías tanto centrales corticosubcorticales comoperiféricas, que desempeñan un papel activo no solo en la génesis del dolor, sino enlas manifestaciones autonómicas y visuales que acompañan la cefalea. Así mismo, estesistema es el responsable de los mecanismos de sensibilización central característicosdel dolor. En el artículo se desarrollan brevemente las principales estructuras queparticipan en la génesis de las cefaleas primarias y sus interacciones en las diferentespartes del sistema nervioso...

The pathophysiology of primary headache iscomplex and it includes several interactionsthat regulate the nociceptive process. The trigeminal-vascular system is perhaps one of theprincipal structures that generate pain due tothe integration of several pathways both centraland peripheral. In addition to this, the trigeminalvascular system also plays a central role inthe autonomic and visual symptoms that affectindividuals with headache and in the centralsensitization process. In this article we brieflydiscuss the main structures that participate in thepathophysiology of primary headaches and theirinteractions in the different levels of the centralnervous system...

Patent foramen ovale in trigeminal autonomic cephalalgias and hemicrania continua: a non-specific pathophysiological occurrence? / Foramen oval patente em cefaleias trigêmino-autonômicas e hemicrania contínua: uma ocorrência fisiopatológica não específica?

Patent foramen ovale (PFO), a relatively common abnormality in adults, has been associated with migraine. Few studies also linked PFO with cluster headache (CH). To verify whether right-to-left shunt (RLS) is related to headaches other than migraine and CH, we used transcranial Doppler following microbubbles injection to detect shunts in 24 CH, 7 paroxysmal hemicrania (PH), one SUNCT, two hemicrania continua (HC) patients; and 34 matched controls. RLS was significantly more frequent in CH than in controls (54 percent vs. 25 percent, p=0.03), particularly above the age of 50. In the HC+PH+SUNCT group, RLS was found in 6 patients and in 2 controls (p=0.08). Smoking as well as the Epworth Sleepiness Scale correlated significantly with CH, smoking being more frequent in patients with RLS. PFO may be non-specifically related to trigeminal autonomic cephalalgias and HC. The headache phenotype in PFO patients probably depends on individual susceptibility to circulating trigger factors.

O forame oval patente (FOP), uma anormalidade cardíaca relativamente comum em adultos, tem sido associado à enxaqueca, mas raramente às cefaléias trigêmino-autonômicas (TACs). Utilizamos o Doppler transcraniano (DTC) para detecção de shunt direito-esquerdo (SDE) em 24 pacientes com cefaléia em salvas (CS), sete com hemicrania paroxística (HP), dois com hemicrania continua (HC) e um com SUNCT; alem de 34 controles. O SDE foi mais frequente nos pacientes com CS do que nos controles (54 por cento vs. 25 por cento p=0,03), particularmente acima de 50 anos. No grupo HP+HC+SUNCT, o SDE foi encontrado em seis pacientes e dois controles (p=0,08). O hábito de fumar, bem como sonolência excessiva diurna foram mais frequentes em paciente com CS. O FOP pode ter importância inespecífica na fisiopatologia das TACs e HC, na dependência da susceptibilidade individual a fatores desencadeantes.

Cefaleas primarias revisión de criterios diagnósticos y abordajes terapéuticos / Primary cephaleas: a revision of its diagnosis and therapeutic approach

Esta revisión aborda las cefaleas primarias, su diagnóstico y tratamiento. Para la IHS son: migraña, cefalea tensional, cluster y otros. Migraña: La segunda en prevalencia y la de mayor morbilidad, el aura diferencia la migraña con aura (Mca) de la sin aura (Msa). Epidemiología: prevalencia 10% con una relación 3: 1 mujer-hombre. Fisiopatología: es un trastorno nociceptivo central primario, con compromiso secundario vascular. Tratamiento: específico y no específico, tanto de las crisis como preventivo. Trastornos psiquiátricos y migraña: existe evidencia de correlación clínico patológica y farmacológica mayormente entre Mca y diversas patologías psiquiátricas. Migraña en el niño: se presenta con diferencias clínicas responde a otra farmacoterapia y es de gran importancia el enfoque familiar. Migraña y hormonas: el principal factor hormonal relacionado a la migraña es la caída hormonal. Migraña y epilepsia: comparte la hiperexcitabilidad cerebral y medicación. Migraña y enfermedad cerebrovascular: factores vasculares e isquémicos comunes. Medicina basada en la evidencia: supone un importante avance en la medición de la efectividad de los tratamientos. Cefalea tensional: la más frecuente de todas las cefaleas, subdiagnosticada. Diferencias entre episódica y crónica. Epidemiología: leve preponderancia femenina. Fisiopatología y factores influyentes: destaca el rol del sistema nociceptivo, el sedentarismo, el estrés y la tensión muscular. Tratamiento: farmacológico y no farmacológico. Cefalea en racimo: de menor prevalencia pero con clínica frondosa, muy invalidante pero con tratamiento efectivo. Otras cefaleas primarias: es importante desensibilizar de los factores desencadenantes. Conclusión: rescatamos conceptos sobre la tarea del médico de aliviar el sufrimiento del paciente, a través de un diagnóstico y un tratamiento adecuados.

This review focuses on primary headaches, its diagnosis and treatment. For the IHS specialists they are: migraine, tension-type headache (TTH), cluster and others. Migraine: the second in prevalence and the first in morbility, clinical features and differences between migraine with (Ma) and without aura (Mo). Epidemiology: 10% prevalence and 3: 1 women to men proportion. Patophysiology: primary central nociception disorder with secondary vascular involvement. Treatment: specific and non-specific, acute and preventive. Psychiatric disorders and migraine: there is evidence of clinical and pharmacologicallinks, mainly between Ma and several psychiatric disorders. Migraine in children’s: important clinical and therapeutic differences from adult, importance of family approach. Migraine and hormones: the importance of estrogens drops, as trigger factor, treatment. Migraine and epilepsy: both shares neuronal hyperexcitability pattern. Migraine and stroke: vascular and ischemic factors involved. Evidence-based medicine: improves treatment's results and studies outcome evaluation. TTH: first in prevalence, still highly sub diagnosed. Main clinical presentations: episodic and chronic. Epidemiology: slight female preponderance. Patophysiology and trigger factors: the role of limbic nociceptive system, sedentarism stress and muscular tension. Treatment: pharmacological and non-pharmacological. Cluster headache: low prevalence but high daily-living activities impact, effective treatment. Other primary headaches: variability of trigger factors and role of desensitization process. Conclusion: we remark the complexity of headache and the of physicians' role: to relief patients suffering, throughout a precise diagnosis and treatment.