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1.
Arq. bras. cardiol ; 118(2): 505-516, 2022. tab, graf
Article in English, Portuguese | LILACS | ID: biblio-1364318

ABSTRACT

Resumo Fundamento A estimulação ventricular direita convencional aumenta o risco de fibrilação atrial e insuficiência cardíaca em portadores de marca-passo. A estimulação do ramo esquerdo (RE) do sistema His-Purkinje pode evitar os desfechos indesejados da estimulação ventricular direita. Objetivo Analisar retrospectivamente os desfechos intraoperatórios, eletrocardiográficos e os dados clínicos do seguimento inicial de pacientes submetidos à estimulação do RE. Métodos Foram avaliados os parâmetros eletrônicos do implante e eventuais complicações precoces de 52 pacientes consecutivos submetidos à estimulação do sistema de condução. O nível de significância alfa adotado foi igual a 0,05. Resultados 52 pacientes foram submetidos a estimulação do RE do sistema His-Purkinje, obtendo sucesso em 50 procedimentos. 69,2% dos pacientes eram do sexo masculino e a mediana e intervalo interquatil da idade no momento do implante foi de 73,5 (65,0-80,0) anos. A duração do QRS pré-implante foi de 146 (104-175) ms e de 120 (112-130) ms após o procedimento. O tempo de ativação do ventrículo esquerdo foi de 78 (70-84) ms. A amplitude da onda R foi de 12,00 (7,95-15,30) mV, com limiar de estimulação de 0,5 (0,4-0,7) V × 0,4 ms e impedância de 676 (534-780) ohms. O tempo de procedimento foi de 116 (90-130) min e o tempo de fluoroscopia foi de 14,2 (10,0-21,6) min. Conclusão A estimulação cardíaca do sistema de condução His-Purkinje por meio da estimulação do ramo esquerdo é uma técnica segura e factível. Nesta casuística, apresentou alta taxa de sucesso, foi realizada com tempo de procedimento e fluoroscopia baixos e obteve medidas eletrônicas adequadas.


Abstract Background Conventional right ventricular pacing increases the risk of atrial fibrillation and heart failure in pacemaker patients. Stimulation of the left bundle branch (LBB) of the His-Purkinje system can prevent the unwanted outcomes of right ventricular pacing. Objective To retrospectively analyze the intraoperative outcomes, electrocardiographic and clinical data from the initial follow-up of patients submitted to stimulation of the LBB. Methods The electronic parameters of the implant and of possible early complications of 52 consecutive patients submitted to stimulation of the conduction system were evaluated. The adopted significance level was 0.05. Results Fifty-two patients underwent left bundle branch stimulation, with 50 successful procedures; 69.2% of the patients were male, and the median and interquartile range of age at the time of implantation was 73.5 (65.0-80.0) years. The pre-implant QRS duration was 146 (104-175) ms and 120 (112-130) ms after the procedure. The left ventricle activation time was 78 (70-84) ms. The R-wave amplitude was 12.00 (7.95-15.30) mV, with a stimulation threshold of 0.5 (0.4-0.7) V x 0.4 ms and impedance of 676 (534-780) ohms. The procedure duration was 116 (90-130) min, and the fluoroscopy time was 14.2 (10.0-21.6) min. Conclusion Cardiac stimulation of the His-Purkinje conduction system through the stimulation of the left bundle branch is a safe and feasible technique. In this study, it showed a high success rate, with low procedure and fluoroscopy periods, achieving adequate electronic measurements.


Subject(s)
Humans , Male , Bundle of His , Cardiac Pacing, Artificial/methods , Retrospective Studies , Treatment Outcome , Electrocardiography/methods , Heart Conduction System
2.
Arq. bras. cardiol ; 118(2): 488-502, 2022. tab, graf
Article in English, Portuguese | LILACS | ID: biblio-1364323

ABSTRACT

Resumo Fundamento A estimulação cardíaca artificial (ECA) por captura direta ou indireta do feixe de His resulta em contração ventricular sincrônica (ECA fisiológica). Objetivos Comparar sincronia cardíaca, características técnicas e resultados de parâmetros eletrônicos entre duas técnicas de ECA indireta do feixe de His: a não seletiva e a parahissiana. Métodos Intervenção experimental (novembro de 2019 a abril de 2020) com implante de marca-passo definitivo (MPd) DDD em pacientes com fração de ejeção ventricular esquerda > 35%. Foram comparadas a sincronia cardíaca resultante mediante algoritmo de análise eletrocardiográfica da variância espacial do QRS e as características técnicas associadas a cada método entre ECA hissiana não seletiva (DDD-His) e parahissiana (DDD-Var). Resultados De 51 pacientes (28 homens), 34 (66,7%) foram alocados no grupo DDD-Var e 17 (33,3%), no grupo DDD-His, com idade média de 74 e 79 anos, respectivamente. No grupo DDD-Var, a análise da variância espacial do QRS (índice de sincronia ventricular) mostrou melhora após o implante de MPd (p < 0,001). Ao ECG pós-implante, 91,2% dos pacientes do grupo DDD-Var mostraram padrão fisiológico de ECA, comprovando ativação similar à do DDD-His (88,2%; p = 0,999). O eixo do QRS estimulado também foi similar (fisiológico) para ambos os grupos. A mediana do tempo de fluoroscopia do implante foi de 7 minutos no grupo DDD-Var e de 21 minutos no DDD-His (p < 0,001), favorecendo a técnica parahissiana. A duração média do QRS aumentou nos pacientes do DDD-Var (114,7 ms pré-MPd e 128,2 ms pós-implante, p = 0,044). A detecção da onda R foi de 11,2 mV no grupo DDD-Var e de 6,0 mV no DDD-His (p = 0,001). Conclusão A ECA parahissiana comprova recrutamento indireto do feixe de His, mostrando-se uma estratégia eficaz e comparável à ECA fisiológica ao resultar em contração ventricular sincrônica similar à obtida por captura hissiana não seletiva.


Abstract Background Artificial cardiac pacing by direct or indirect His bundle capture results in synchronous ventricular contraction (physiological pacing). Objectives To compare cardiac synchronization, technical characteristics, and electronic parameters between two techniques of indirect His-bundle pacing: non-selective (NS-HBP) vs para-Hisian pacing (PHP). Methods The experimental intervention (between November 2019 and April 2020) consisted of implanting a DDD pacemaker in patients who had left ventricular ejection fraction (LVEF) > 35%. The resulting cardiac synchronization was compared using an electrocardiographic algorithm that analyzed QRS variation and the technical characteristics of non-selective Hisian pacing (DDD-His) and para-Hisian pacing (DDD-Var). Results Of 51 total patients (men: 28), 66.7% (34) were allocated to the DDD-Var group and 33.3% (17) to the DDD-His group. The mean ages in each group were 74 and 79 years, respectively. In the DDD-Var group, QRS variation (ventricular synchrony) improved after implantation (p < 0.001). In post-implantation ECG, 91.2% of the DDD-Var group presented a physiological pacing pattern, which was similar to the DDD-His group (88.2%; p = 0.999). The paced QRS axis was also similar (physiological) for both groups. Intraoperative fluoroscopy time (XRay) during implantation was lower for the para-Hisian technique (median 7 min in the DDD-Var group vs 21 min in the DDD-His group, p < 0.001). The mean QRS duration increased in the DDD-Var group (114.7 ms pre-implantation vs 128.2 ms post-implantation, p = 0.044). The mean post-implantation R-wave amplitude was 11.2 mV in the DDD-Var group vs 6.0 mV in the DDD-His group, p = 0.001. Conclusion Para-Hisian pacing appears to indirectly recruit the His bundle, which would make this an effective and comparable strategy for physiological pacing, resulting in synchronous ventricular contraction similar to that of non-selective Hisian pacing.


Subject(s)
Humans , Male , Aged , Bundle of His , Ventricular Function, Left/physiology , Stroke Volume , Cardiac Pacing, Artificial/methods , Treatment Outcome , Electrocardiography/methods
3.
Rev. colomb. anestesiol ; 49(4): e301, Oct.-Dec. 2021. tab, graf
Article in English | LILACS, COLNAL | ID: biblio-1341240

ABSTRACT

Abstract Patients with implantable electric stimulation devices are challenging to the anesthesiologist since these cases demand a comprehensive knowledge about how the device operates, the indications for the implant and the implications that must be addressed during the perioperative period. This article is intended to provide the reader with clear and structured information so that the anesthesiologist will be able to safely deal with the situation of a patient with an implantable cardiac stimulation device, who has been programmed for emergent surgery. A search for the scientific evidence available was conducted in Pubmed / Medline, ScienceDirect, OVID, SciELO), for a non-systematic review. The incidence of the use of cardiac electric stimulation devices has been growing. Their operation is increasingly complex, and demands being constantly updated on the knowledge in the area.


Resumen El paciente portador de un dispositivo de estimulación eléctrica cardiaca implantable se convierte en un reto para el anestesiólogo debido a que implica un conocimiento integral que abarca su funcionamiento, las indicaciones que llevaron a su implante y las implicaciones que se deben abordar en el perioperatorio. Este artículo busca proporcionar al lector información clara y estructurada que le permita al anestesiólogo enfrentarse de forma segura al escenario de un paciente con un dispositivo de estimulación eléctrica cardiaca implantable programado para cirugía emergente. Se realizó una búsqueda de la evidencia científica disponible en bases de datos (Pubmed / Medline, ScienceDirect, OVID, SciELO), para una revisión no sistemática. La incidencia en el uso de dispositivos de estimulación eléctrica cardiaca viene en aumento. Su funcionamiento es cada vez más complejo lo cual implica una actualización permanente del conocimiento en esta área.


Subject(s)
Humans , Cardiac Pacing, Artificial , Perioperative Period , Cardiac Resynchronization Therapy Devices , Radiography , Defibrillators, Implantable , Electric Stimulation/methods , Anesthesiologists
6.
Article in English | WPRIM | ID: wpr-880670

ABSTRACT

OBJECTIVES@#To compare the left ventricular systolic function between the 1eft bundle branch pacing (LBBP) and right ventricular septum pacing (RVSP) in patients with pacemaker dependence by three-dimensional speckle tracking imaging (3D-STI).@*METHODS@#A total of 65 patients with atrioventricular block (AVB) (Mobitz type II second-degree AVB, high-degree AVB, or third-degree AVB), who underwent permanent cardiac pacing implantation including 32 patients receiving LBBP (LBBP group) and 33 patients receiving RVSP (RVSP group) from June 2018 to June 2019,were enrolled in this study. These patients met the following inclusion criterion: pre-operative left ventricular ejection fraction (LVEF)>50% and ventricular pacing rate>40% at 6-month programming follow-up; and the patients underwent echocardiography at pre-operation and 6 months after operation. The 3D-STI was used to obtain global longitudinal strain (GLS), global circumferential strain (GCS), global radial strain (GRS), and global area strain (GAS).@*RESULTS@#All the patients in the LBBP group and the RVSP group had normal LVEF, there was no significant difference between the 2 group (@*CONCLUSIONS@#For patients with pacemaker dependence and normal LVEF at pre-operation, the cardiac function in the LBBP group is not significantly better than that in the RVSP group in short term follow-up. But in terms of physiologic pacing and long-term cardiac function protection, the 1eft bundle branch pacing is an optimal pacing mode.


Subject(s)
Bundle of His , Cardiac Pacing, Artificial , Humans , Pacemaker, Artificial , Stroke Volume , Ventricular Function, Left , Ventricular Septum/diagnostic imaging
7.
Arch. cardiol. Méx ; 90(3): 328-335, Jul.-Sep. 2020. graf
Article in Spanish | LILACS | ID: biblio-1131051

ABSTRACT

Resumen La estimulación apical permanente del ventrículo derecho (VD) puede producir asincronía del ventrículo izquierdo (VI) desde los puntos de vista eléctrico y mecánico. Este fenómeno es efecto de una alteración de la activación normal del VI que lleva al deterioro de la función sistólica y la aparición de insuficiencia cardíaca y sus efectos deletéreos relacionados. Para el estudio de la asincronía eléctrica del VI se ha propuesto en fecha reciente el nuevo sistema electrocardiográfico no invasivo Synchromax, que puede cuantificar el grado de asincronía eléctrica que causa una subsecuente asincronía mecánica. Esta última se ha estudiado casi siempre mediante la ecocardiografía transtorácica bidimensional (ETT2D) a través del Doppler tisular y la deformación miocárdica y ahora con la ecocardiografía tridimensional transtorácica en tiempo real (E3DTR). La relación entre estos fenómenos ha sido motivo de estudio a fin de identificar a los pacientes que se benefician de la transición a un tratamiento de resincronización cardíaca. Conclusiones: La estimulación artificial permanente del VD produce asincronía eléctrica del VI que puede cuantificarse mediante el nuevo sistema electrocardiográfico Synchromax y desencadenar asincronía mecánica estudiada mediante la ecocardiografía transtorácica para reconocer a los pacientes que pueden beneficiarse de un tratamiento de resincronización cardíaca.


Abstract Permanent apical pacing of right ventricle (RV) can produce dyssynchrony of the left ventricle (LV) from an electrical and mechanical point of view. This phenomenon is caused by an alteration in the normal activation of LV leading to a deterioration of systolic function and the appearance of heart failure and its associated deleterious effects. For the study of the electrical asynchrony of the LV, a new noninvasive electrocardiographic system Synchromax has recently been proposed, being able to quantify the degree of electrical asynchrony that leads to a subsequent mechanical dyssynchrony. The latter has been traditionally studied by two-dimensional transthoracic echocardiography (2DTTE) through tissue Doppler and myocardial deformation and lately by real-time 3-dimensional echocardiography (RT3DE). The relationship between these phenomena has been the subject of study to predict those patients who benefit from an “upgrade” to cardiac resynchronization therapy. Conclusions: Permanent apical pacing of the RV produces electrical dyssynchrony of the LV that can be quantified using a new electrocardiographic system Synchromax and trigger mechanical asynchrony studied through transthoracic echocardiography allowing to predict those patients who benefit from cardiac resynchronization therapy.


Subject(s)
Humans , Cardiac Pacing, Artificial/adverse effects , Ventricular Dysfunction, Left/etiology , Echocardiography , Cardiac Pacing, Artificial/methods , Echocardiography, Doppler , Ventricular Dysfunction, Left/diagnostic imaging , Echocardiography, Three-Dimensional , Cardiac Resynchronization Therapy/methods
8.
Arch. cardiol. Méx ; 90(1): 12-16, Jan.-Mar. 2020. graf
Article in English | LILACS | ID: biblio-1131000

ABSTRACT

Abstract Complete heart block (CHB) results from dysfunction of the cardiac conduction system, which results in complete electrical dissociation. The ventricular escape rhythm can have its origin anywhere from the atrioventricular node to the bundle branch-Purkinje system. CHB typically results in bradycardia, hypotension, fatigue, hemodynamic instability, syncope, or even Stokes-Adams syndrome. Escape rhythm originating above the bifurcation of the His bundle (HB) produces narrow QRSs with relatively rapid heart rate (HR) (except in cases of His system disease). We present a middle-aged man with an HR of 34 bpm, progressive fatigue, in whom a temporary pacemaker was implanted in the subtricuspid region. The post-intervention electrocardiogram had unusual features.


Resumen El bloqueo cardíaco completo (BCC) resulta de la disfunción del sistema de conducción cardíaco, lo que ocasiona una disociación eléctrica completa entre aurículas y ventrículos. El ritmo de escape resultante puede tener su origen en cualquier lugar desde el nodo auriculoventricular hasta el sistema His Purkinje. El BCC generalmente produce bradicardia, hipotensión, fatiga, inestabilidad hemodinámica, síncope o incluso el síndrome de Stokes-Adams. El ritmo de escape que se origina por encima de la bifurcación del haz de His produce intervalos QRS estrechos con frecuencia cardíaca no muy lenta (excepto en casos de enfermedad del sistema Hisiano). Presentamos a un hombre de mediana edad con una frecuencia cardíaca de 34 lpm, fatiga progresiva, en el que se implantó un marcapasos temporario en la región subtricuspídea. El electrocardiograma resultante a la intervención presentó características inusuales.


Subject(s)
Humans , Male , Middle Aged , Cardiac Pacing, Artificial/adverse effects , Heart Rate/physiology , Heart Ventricles/physiopathology , Electrocardiography , Fatigue/physiopathology , Heart Conduction System/physiopathology
9.
Rev. enferm. UERJ ; 27: e45014, jan.-dez. 2019. tab
Article in Portuguese | LILACS, BDENF | ID: biblio-1097364

ABSTRACT

Objetivo: avaliar a qualidade de vida de indivíduos portadores de dispositivo cardíaco eletrônico implantável. Método: estudo descritivo e transversal realizado com 50 indivíduos em 2018. Utilizou-se o SF-36 e AQUAREL. Resultados: a comorbidade mais frequente foi a hipertensão arterial sistêmica ­ 39 (78%), a cardiopatia de base a bradicardia ­ 18 (36%) e queixas de palpitação e pré-síncope. Predominaram indivíduos com tempo do dispositivo cardíaco eletrônico de até 5 anos ­ 24 (48%), sem troca de gerador ­ 31 (62%). A maioria negou o consumo de bebida alcóolica ­ 47 (94%), de cigarros ­ 44 (88%) e não realiza atividade física regular ­ 34 (68%). No SF-36, o menor escore foi no domínio aspectos físicos (15) e o maior em dor (88,8). No AQUAREL o menor escore foi no domínio dispneia (78,98) e o maior em desconforto (86,54). Conclusão: constatou-se sintomatologia reduzida. Houve associação significativa entre sexo masculino e atividade física. Os indivíduos apresentam melhora da qualidade de vida após a implantação do dispositivo cardíaco.


Objective: to evaluate the quality of life of individuals with implantable electronic cardiac devices. Method: descriptive and cross-sectional study conducted with 50 individuals in 2018. SF-36 and AQUAREL were used. Results: the most frequent comorbidity was systemic arterial hypertension ­ 39 (78%), baseline heart disease bradycardia ­ 18 (36%) and complaints of palpitation and pre-syncope. Individuals with electronic cardiac device time of up to 5 years 24 (48%) predominated, without changing the generator ­ 31 (62%). The majority denied alcohol consumption ­ 47 (94%), cigarettes ­ 44 (88%) and regular physical activity ­ 34 (68%). In the SF-36 the lowest score was in the physical aspects domain (15) and the highest in pain (88.8). In AQUAREL the lowest score was in the domain dyspnea (78.98) and the highest in discomfort (86.54). Conclusion: reduced symptomatology was observed. There was a significant association between males and physical activity. Individuals have improved quality of life after implantation of the cardiac device.


Objetivo: evaluar la calidad de vida de las personas con dispositivos cardíacos electrónicos implantables. Método: estudio descriptivo y transversal realizado con 50 individuos, en 2018. SF-36 y AQUAREL se utilizaron. Resultados: la comorbilidad más frecuente fue la hipertensión arterial sistémica ­ 39 (78%), las cardiopatías subyacentes, bradicardia ­ 18 (36%) y quejas de palpitación y presíncope. Predominan los individuos con tiempo de dispositivo cardíaco electrónico de hasta 5 años ­ 24 (48%) sin cambiar el generador ­ 31 (62%). La mayoría negó el consumo de alcohol ­ 47 (94%), cigarrillos ­ 44 (88%) y actividad física regular 34 (68%). En el SF-36, la puntuación más baja estaba en el dominio de aspectos físicos (15) y la más alta en dolor (88.8). En AQUAREL, la puntuación más baja estaba en el dominio disnea (78,98) y la más alta en malestar (86,54). Conclusión: se observó una sintomatología reducida. Hubo una asociación significativa entre los varones y la actividad física. Los individuos han mejorado la calidad de vida después de la implantación del dispositivo cardíaco.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Pacemaker, Artificial , Quality of Life , Electric Countershock , Cardiac Pacing, Artificial , Cardiovascular Diseases/therapy , Cardiac Resynchronization Therapy Devices , Cardiovascular Diseases/complications
10.
Arq. bras. cardiol ; 112(4): 410-421, Apr. 2019. tab, graf
Article in English | LILACS | ID: biblio-1001291

ABSTRACT

Abstract Background: Considering the potential deleterious effects of right ventricular (RV) pacing, the hypothesis of this study is that isolated left ventricular (LV) pacing through the coronary sinus is safe and may provide better clinical and echocardiographic benefits to patients with bradyarrhythmias and normal ventricular function requiring heart rate correction alone. Objective: To assess the safety, efficacy, and effects of LV pacing using an active-fixation coronary sinus lead in comparison with RV pacing, in patients eligible for conventional pacemaker (PM) implantation. Methods: Randomized, controlled, and single-blinded clinical trial in adult patients submitted to PM implantation due to bradyarrhythmias and systolic ventricular function ≥ 0.40. Randomization (RV vs. LV) occurred before PM implantation. The main results of the study were procedural success, safety, and efficacy. Secondary results were clinical and echocardiographic changes. Chi-squared test, Fisher's exact test and Student's t-test were used, considering a significance level of 5%. Results: From June 2012 to January 2014, 91 patients were included, 36 in the RV Group and 55 in the LV Group. Baseline characteristics of patients in both groups were similar. PM implantation was performed successfully and without any complications in all patients in the RV group. Of the 55 patients initially allocated into the LV group, active-fixation coronary sinus lead implantation was not possible in 20 (36.4%) patients. The most frequent complication was phrenic nerve stimulation, detected in 9 (25.7%) patients in the LV group. During the follow-up period, there were no hospitalizations due to heart failure. Reductions of more than 10% in left ventricular ejection fraction were observed in 23.5% of patients in the RV group and 20.6% of those in the LV group (p = 0.767). Tissue Doppler analysis showed that 91.2% of subjects in the RV group and 68.8% of those in the LV group had interventricular dyssynchrony (p = 0.022). Conclusion: The procedural success rate of LV implant was low, and the safety of the procedure was influenced mainly by the high rate of phrenic nerve stimulation in the postoperative period.


Resumo Fundamento: Considerando-se os potenciais efeitos deletérios da estimulação do ventrículo direito (VD), a hipótese desse estudo é que a estimulação unifocal ventricular esquerda pelo seio coronário é segura e pode proporcionar melhores benefícios clínicos e ecocardiográficos aos pacientes com bradiarritmias que apresentam função ventricular normal, necessitando apenas da correção da frequência cardíaca. Objetivos: Avaliar a segurança, a eficácia e os efeitos da estimulação do ventrículo esquerdo (VE), utilizando um cabo-eletrodo com fixação ativa, em comparação à estimulação do VD. Métodos: Estudo clínico, randomizado, simples-cego em pacientes adultos com indicação de marca-passo (MP) devido a bradiarritmias e função ventricular sistólica ≥ 0,40. A randomização aleatória (VD vs VE) ocorreu antes do procedimento. Os desfechos primários do estudo foram: o sucesso, a segurança e a eficácia do procedimento proposto. Os desfechos secundários foram: a evolução clínica e alterações ecocardiográficas. Empregou-se os testes Qui-quadrado, Exato de Fisher e t de Student, com nível de significância de 5%. Resultados: De junho de 2012 a janeiro de 2014 foram incluídos 91 pacientes, sendo 36 no grupo VD e 55 no grupo VE. As características basais dos pacientes dos dois grupos foram similares. O implante de MP foi realizado com sucesso e sem nenhuma intercorrência em todos os pacientes do grupo VD. Dos 55 pacientes inicialmente alocados para o grupo VE, o implante do cabo-eletrodo em veias coronárias não foi possível em 20 (36,4%) pacientes. Dentre os 35 pacientes que permaneceram com o cabo-eletrodo no VE, a estimulação frênica foi a complicação mais frequente e foi detectada em 9 (25,7%) pacientes. Na fase de seguimento clínico, não houve hospitalizações por insuficiência cardíaca. Reduções superiores a 10% na fração de ejeção do VE foram observadas em 23,5% dos pacientes do grupo VD e em 20,6% dos pacientes do grupo VE (p = 0,767). A análise feita pelo Doppler tecidual mostrou que 91,2% dos indivíduos do grupo VD e 68,8% dos do grupo VE apresentaram dissincronia interventricular (p = 0,022). Conclusões: A taxa de sucesso do implante no VE foi baixa e a segurança do procedimento foi influenciada, principalmente, pela alta taxa de estimulação frênica no pós-operatório.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged , Aged, 80 and over , Young Adult , Pacemaker, Artificial/adverse effects , Bradycardia/therapy , Cardiac Pacing, Artificial/methods , Heart Ventricles/physiopathology , Stroke Volume , Bradycardia/physiopathology , Cardiac Pacing, Artificial/adverse effects , Single-Blind Method , Reproducibility of Results , Treatment Outcome , Prosthesis Implantation/methods , Heart Failure/etiology , Heart Failure/physiopathology
11.
CorSalud ; 11(1): 75-78, ene.-mar. 2019. graf
Article in Spanish | LILACS | ID: biblio-1089713

ABSTRACT

RESUMEN Hombre de 80 años de edad, con antecedentes de miocardiopatía dilatada de origen isquémico, con disfunción sisto-diastólica del ventrículo izquierdo, que inicialmente presentó flutter auricular con inestabilidad hemodinámica y se realizó cardioversión eléctrica, luego de la cual se obtuvo un ritmo no precedido de onda P a 40 latidos por minuto, que fue interpretado como fibrilación auricular bloqueada; razón por la que se le colocó un marcapasos externo. Durante su evolución se realizó electrocardiograma de 12 derivaciones, donde se evidenció estimulación ventricular permanente con conducción retrógrada (ventrículo-auricular). Se disminuyó la frecuencia de estimulación para priorizar el ritmo espontáneo del paciente y se obtuvo marcada mejoría de la curva de presión arterial.


ABSTRACT An 80-year-old male patient is presented, with previous dilated cardiomyopathy of ischemic etiology, with systo-diastolic left ventricular dysfunction, who initially presented atrial flutter and hemodynamic instability, thus, an electrical cardioversion was performed. After this procedure, a blocked atrial fibrillation was observed. Thus, an external pacemaker was placed. During the evolution, a 12 lead electrocardiogram was performed, showing permanent ventricular stimulation with retrograde conduction (ventriculo-atrial). The pacing rate was diminished for prioritizing the patient's spontaneous rhythm resulting in an improvement of the blood pressure curve.


Subject(s)
Heart Conduction System , Cardiac Pacing, Artificial , Atrial Function
12.
Bogotá; s.n; 2019. 225 p. tab, graf.
Thesis in Spanish | LILACS, BDENF, COLNAL | ID: biblio-1359252

ABSTRACT

Antecedentes: El cardiodesfibrilador mejora la supervivencia tratando los eventos arrítmicos fatales. La implementación de la terapia se acompaña de cambios importantes a nivel físico, psicológico y social y modifica el estilo de vida, lo que supone nuevos retos para el cuidado de la salud. El objetivo de esta investigación fue evaluar los efectos de la intervención de enfermería sobre: el nivel de aceptación, el tiempo de ajuste y las consecuencias de integrar la tecnología a la vida cotidiana. Diseño y métodos: Estudio cuantitativo de tipo cuasiexperimental con dos grupos de intervención y uno de control; en total se asignaron aleatoriamente 72 sujetos (n=24). La encuesta de caracterización sociodemográfica y el "Cuestionario de Florida para la aceptación del paciente" versión en español permitieron la recolección de los datos. Se realizó la intervención de enfermería "Aceptación en Personas con Estimulación Cardíaca Cardiodesfibrilador" (APECC) con el protocolo clínico. Resultados: Los hallazgos evidenciaron un aumento estadísticamente significativo en el nivel de aceptación global en las mediciones efectuadas a la semana y al mes (valor de la estadística Z= -3,186, valor-p<0,01) Adicionalmente las comparaciones entre los grupos intervención y control demostraron que la intervención APECC disminuye el tiempo de ajuste dados los mejores niveles de aceptación en el tiempo de los grupos de intervención (valor de la estadística Z= -3,860, valor-p<0,000). Conclusiones: La intervención de enfermería aplicada en el periodo de preimplantación tiene efectos positivos sobre la aceptación de la persona al cardiodesfibrilador y disminuye el tiempo de ajuste y las consecuencias físicas, psicológicas y sociales.


Background: Defibrillators improve survival by treating fatal arrhythmic events. Therapy implementation is accompanied by important changes at physical, psychological, and social levels and it modifies lifestyle, which represents new challenges for health care. The objective of this research was to evaluate the effects of a nursing intervention on acceptance level, time of adjustment, and consequences of integrating technology into daily life. Design and methods: A quantitative quasi-experimental study with two intervention groups and a control group, in total 72 subjects were randomly assigned (n = 24). Sociodemographic characteristics survey and the Spanish version of the "Florida Patient Acceptance Survey" enabled data collection. The nursing intervention Acceptance in Patients with Defibrillator Cardiac Pacing (APECC in Spanish) was applied with the clinical protocol. Results: Findings showed a statistically significant increase in the overall acceptance level for weekly and monthly measurements (statistic value Z=-3.186, p<0.01). Additionally, comparisons between intervention and control groups showed that the APECC intervention decreases the adjustment time given better acceptance levels over time in the intervention groups (statistic value Z = -3,860, p <0.000). Conclusions: Nursing intervention applied during preimplantation period has positive effects on patient acceptance of defibrillators and decreases adjustment time as well as physical, psychological and social consequences.


Subject(s)
Humans , Male , Female , Defibrillators, Implantable , Nursing Care , Cardiac Pacing, Artificial , Patient Acceptance of Health Care , Clinical Trial
13.
Chinese Medical Journal ; (24): 190-196, 2019.
Article in English | WPRIM | ID: wpr-772861

ABSTRACT

OBJECTIVE@#Physiologic cardiac pacing is a novel technique which has been largely popularized in recent decades. His bundle pacing (HBP) has been long considered the most physiologic pacing method; however, with the widespread implementation of this method, its disadvantages have become apparent. In this context, left bundle branch pacing (LBBP)-directly engaged in the His-Purkinje system-has been foreseen as the best pacing method to mimic physiologic activation patterns. This review aimed to summarize recent approaches to physiologic cardiac pacing.@*DATA SOURCES@#This review included fully peer reviewed publications up to July 2018, found in the PubMed database using the keywords "His bundle branch pacing," "right ventricular pacing," and "physiologic pacing."@*STUDY SELECTION@#All selected articles were in English, with no restriction on study design.@*RESULTS@#The HBP has been studied worldwide, and is currently considered the most physiologic pacing method. However, it has disadvantages, such as high pacing threshold, unsatisfactory sensing and long procedure times, among others. Although LBBP is theoretically superior to HBP, the clinical relevance of this difference remains under debate, as few large randomized clinical trials with LBBP have been published.@*CONCLUSIONS@#Although HBP indeed appears to be the most physiologic pacing method, it has certain shortcomings, such as high pacing threshold, difficult implantation due to specific anatomic features, and others. Further studies are required to clarify the clinical significance of LBBP.


Subject(s)
Cardiac Catheterization , Cardiac Pacing, Artificial , Cardiac Resynchronization Therapy , Humans , Randomized Controlled Trials as Topic
14.
Chinese Medical Journal ; (24): 534-541, 2019.
Article in English | WPRIM | ID: wpr-774802

ABSTRACT

BACKGROUND@#The current upper-frequency cutoff of 150 Hz sometimes causes loss of pacemaker spike and misdiagnosis. We hypothesized that low-pass filter (LPF) other than 150 Hz could improve the detection of pacemaker spike. This study aimed to examine the effect of different LPF on pacemaker spike detection in remote and bedside electrocardiogram (ECG).@*METHODS@#Patients with permanent pacemaker implantation were included during routine follow-up. Standard 12-lead ECGs at 6 different upper-frequency cutoff (40, 100, 150, 200, 300, and 400 Hz) were collected. All ECGs were then transmitted to the remote clinic center. Ventricular and atrial pacing were analyzed by 2 independent medical practitioners.@*RESULTS@#A total of 88 patients' ECGs were analyzed (mean age 73.8 ± 10.2 years and 85 with dual-chamber pacemakers). About 75.3% (64/85) of patients were diagnosed as atrial pacing by pacemaker programming. Among 6 different upper-frequency cutoff, the 300 Hz turned out to perform best in detecting atrial-paced spike (area under the curve [AUC] = 0.73, 95% confidence interval [CI]: 0.61-0.84 vs. 0.56, 95% CI: 0.61-0.84 at 150 Hz; P = 0.002) on bedside ECGs. Using programming as the golden standard, the 300 Hz LPF has a sensitivity of 59.4%, specificity of 85.7%, positive predictive value of 92.7% and negative predictive value of 40.9% on bedside ECGs. As for the ventricular pacing, the 300 Hz LPF also had a higher accuracy (AUC = 0.93; 95% CI = 0.84-1.00) than that at 150 Hz (AUC = 0.86; 95% CI: 0.77-0.94; P < 0.001) in detecting ventricular-paced spike on bedside ECGs. The results of remote ECGs were similar with bedside ECGs.@*CONCLUSIONS@#A filter of 300 Hz cutoff may be recommended for ECG spike detection. With the recommended parameter, remote ECG can perform as well as bedside ECG.


Subject(s)
Aged , Aged, 80 and over , Cardiac Pacing, Artificial , Electrocardiography , Methods , Female , Humans , Male , Middle Aged , Pacemaker, Artificial , Retrospective Studies
16.
RELAMPA, Rev. Lat.-Am. Marcapasso Arritm ; 31(4): 146-155, out.-dez. 2018. tab, ilus
Article in English | LILACS | ID: biblio-999176

ABSTRACT

A anatomia venosa coronária pode dificultar ou impossibilitar o implante com sucesso de um dispositivo de terapia de ressincronização cardíaca. O objetivo desta revisão foi o de apresentar uma abordagem interventiva com muitas técnicas e ferramentas que precisam ser aprendidas e conhecidas para melhorar os resultados desta terapia e a saúde dos pacientes


Coronary venous anatomy can make successful implantation of a cardiac resynchronization therapy device difficult or impossible. The aim of this review is introduce an interventional approach with many techniques and tools that are needed to be learned and known in order to improve the results of this therapy and the health of patients


Subject(s)
Humans , Male , Female , Coronary Sinus , Cardiac Resynchronization Therapy/methods , Phrenic Nerve , Cardiac Pacing, Artificial , Ventricular Function, Left , Coronary Vessels , Electrodes, Implanted , Catheters
17.
RELAMPA, Rev. Lat.-Am. Marcapasso Arritm ; 31(4): 156-159, out.-dez. 2018. ilus
Article in Portuguese | LILACS | ID: biblio-999206

ABSTRACT

Introdução: A estimulação cardíaca temporária eventualmente é necessária por mais de 15 dias. Este contexto clínico está associado a complicações como o deslocamento de eletrodo e perfuração cardíaca, havendo a necessidade de reposicionamento ou troca de eletrodo. Além disto, os eletrodos e geradores convencionais para estimulação cardíaca temporária impõem ao paciente a restrição ao leito e suas consequências. Objetivo: avaliar um método previamente estudado de estimulação temporária relacionado à menor incidência de complicações e que permite a deambulação do paciente. Método: foram estudados 24 pacientes, entre janeiro de 2015 e dezembro de 2017, submetidos a implante de marcapasso provisório com o uso de eletrodo de fixação ativa. Resultados: a média de idade foi de 68,9 anos, e predominantemente do sexo masculino. O tempo médio de uso do marcapasso (MP) provisório foi de 9,7 dias, variando de dois a 28 dias. Durante um tempo total de 233 pacientes/ dia, não houve deslocamento de eletrodos, falhas de estimulação ou necessidade de revisão do sistema. Conclusão: a estimulação provisória utilizando eletrodos de MP definitivo de fixação ativa foi segura e impactou positivamente na qualidade de vida dos pacientes


Introduction: Temporary cardiac pacing is eventually required for more than 15 days. This clinical context is associated with complications such as electrode displacement and cardiac perforation, requiring repositioning or electrode replacement. In addition, conventional electrodes and generators for temporary cardiac stimulation force patients to stay in bed with its consequences. Objective: to evaluate a previously studied method of temporary stimulation related to a lower incidence of complications which allows patient to walk. Method: 24 patients were studied between January 2015 and December 2017, who underwent temporary PM implantation with the use of an active fixation electrode. Results: mean age was 68.9 years, and patients were predominantly male. The mean time of use of the temporary pacemaker (PM) was 9.7 days, ranging from two to 28 days. During a total time of 233 patients/ day, there was no electrode displacement, no stimulation failures or a need for system revision. Conclusion: Temporary stimulation using definitive PM fixation active electrodes was safe and had a positive impact on patients' quality of life


Subject(s)
Humans , Male , Female , Middle Aged , Aged , Pacemaker, Artificial , Cardiac Pacing, Artificial/methods , Electrodes , Prostheses and Implants , Subclavian Vein , Bradycardia/diagnosis , Retrospective Studies , Defibrillators, Implantable , Atrioventricular Block , Heart Atria , Heart Ventricles , Jugular Veins
19.
Rev. bras. cir. cardiovasc ; 33(4): 339-346, July-Aug. 2018. tab, graf
Article in English | LILACS | ID: biblio-958421

ABSTRACT

Abstract Objective: The aim of this study is to compare the continuous and combined suturing techniques in regards to the needing epicardial pacing at the time of weaning from cardiopulmonary bypass (EP-CPB) and to evaluate permanent epicardial pacemaker (PEP) implantation in patients who had undergone surgical ventricular septal defect (VSD) closure. Methods: This single-centre retrospective survey includes 365 patients who had consecutively undergone VSD closure between January 2006 and October 2015. Results: The median age and weight of the patients were 15 months (range 27 days - 56.9 years) and 10 kg (range 3.5 - 100 kg), respectively. Continuous and combined suturing techniques were utilised in 302 (82.7%) and 63 (17.3%) patients, respectively. While 25 (6.8%) patients required EP-CPB, PEP was implanted in eight (2.2%) patients. Comparison of the continuous and combined suturing techniques regarding the need for EP-CPB (72% vs. 28%, P=0.231) and PEP implantation (87.5% vs. 12.5%, P=1.0) were not statistically significant. The rate of PEP implantation in patients with perimembraneous VSD without extension and perimembraneous VSD with inlet extension did not reveal significant difference between the suture techniques (P=1.0 and P=0.16, respectively). In both univariate and multivariate analyses, large VSD (P=0.001; OR 8.63; P=0.011) and perimembraneous VSD with inlet extension (P<0.001; OR 9.02; P=0.005) had a significant influence on PEP implantation. Conclusion: Both suturing techniques were comparable regarding the need for EP-CPB or PEP implantation. Caution should be exercised when closing a large perimembraneous VSD with inlet extension.


Subject(s)
Humans , Male , Female , Infant, Newborn , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Young Adult , Pacemaker, Artificial/statistics & numerical data , Cardiac Pacing, Artificial/methods , Suture Techniques/statistics & numerical data , Heart Septal Defects, Ventricular/surgery , Time Factors , Cardiac Pacing, Artificial/statistics & numerical data , Logistic Models , Reproducibility of Results , Retrospective Studies , Risk Factors , Treatment Outcome , Age Distribution , Statistics, Nonparametric , Heart Block/etiology , Heart Block/therapy , Heart Septal Defects, Ventricular/complications
20.
RELAMPA, Rev. Lat.-Am. Marcapasso Arritm ; 31(3)jul.-set. 2018. ilus
Article in Portuguese | LILACS | ID: biblio-967786

ABSTRACT

Relato de caso de um paciente de 78 anos de idade, portador de marcapasso dupla-câmara há mais de 10 anos por doença do nó sinusal, bloqueio atrioventricular de primeiro grau e bloqueio de ramo direito, que se apresentou com taquicardia de QRS largo incessante e alternância de morfologia do QRS entre deflagração e inibição do canal ventricular


We describe the case of a 78-year-old patient who received a dual-chamber pacemaker implant ten years ago due to sick sinus syndrome, first degree heart block and right bundle branch block and now presents with an incessant wide QRS tachycardia with alternating morphology between deflagration and inhibition of the pacemaker's ventricular channel


Subject(s)
Humans , Male , Aged , Tachycardia, Paroxysmal/diagnosis , Tachycardia, Paroxysmal/therapy , Cardiac Pacing, Artificial/methods , Diagnosis, Differential , Pacemaker, Artificial , Bundle-Branch Block , Electrocardiography, Ambulatory/methods , Electrocardiography/methods , Electrophysiology/methods , Atrioventricular Block , Heart Atria , Heart Ventricles , Amiodarone/therapeutic use
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