RESUMO
The integration of the ventricular function is essential when making decisions over a patient subjected to cardiac electrostimulation in order to understand the structure followed in the new cardiac stimulation and resynchronising therapy guides. To support the importance of ventricular function in cardiac electrostimulation it is important to know: (i)the deleterious effect of stimulation on the right ventricle apex; (ii)the effect over the left ventricular function produced by complete blockage of the left branch, and (iii)left ventricular disfunction as arrythmogenic substrate. When it comes to decide what type of cardiac electrostimualtion to apply we will know: the percentage of ventricular stimulation needed and its ventricular function. A normal ventricular function will enable electrostimulation from the right ventricle apex or alternative site. On the contrary, if this value is lower than 50% the most recommended electrostimulation is cardiac resynchronisation (CRT-P), which will be accompanied by defibrillation (CRT-D) if FEVI is lower than 35%.
Assuntos
Estimulação Cardíaca Artificial/métodos , Cardioversão Elétrica/métodos , Técnicas Eletrofisiológicas Cardíacas/métodos , Ventrículos do Coração/fisiopatologia , Terapia de Ressincronização Cardíaca/métodos , Tomada de Decisão Clínica , Ensaios Clínicos como Assunto , Morte Súbita Cardíaca , Frequência Cardíaca , Humanos , Volume Sistólico , Sístole , Disfunção Ventricular Esquerda/fisiopatologiaRESUMO
La integración de la función ventricular en la toma de decisiones del paciente sometido a electroestimulación cardiaca resulta fundamental para comprender la estructuración de las nuevas guías sobre estimulación cardiaca y terapia de resincronización. Para argumentar la importancia de la función ventricular en la electroestimulación cardiaca es necesario conocer: a)el efecto deletéreo de la estimulación desde el ápex del ventrículo derecho; b)el efecto del bloqueo completo de rama izquierda sobre la función ventricular izquierda, y c)la disfunción ventricular izquierda como sustrato arritmogénico. Así, cuando decidimos el modo de electroestimulación cardiaca a aplicar debemos conocer el porcentaje de estimulación ventricular que precisará y su función ventricular. Si esta es normal, permitirá estimular desde el ápex del ventrículo derecho o desde sitios alternativos al ápex. Por el contrario, si es menor del 50% es recomendable la resincronización cardiaca (CRT-P) acompañada de desfibrilación (CRT-D) si la FEVI es menor del 35%
The integration of the ventricular function is essential when making decisions over a patient subjected to cardiac electrostimulation in order to understand the structure followed in the new cardiac stimulation and resynchronising therapy guides. To support the importance of ventricular function in cardiac electrostimulation it is important to know: (i)the deleterious effect of stimulation on the right ventricle apex; (ii)the effect over the left ventricular function produced by complete blockage of the left branch, and (iii)left ventricular disfunction as arrythmogenic substrate. When it comes to decide what type of cardiac electrostimualtion to apply we will know: the percentage of ventricular stimulation needed and its ventricular function. A normal ventricular function will enable electrostimulation from the right ventricle apex or alternative site. On the contrary, if this value is lower than 50% the most recommended electrostimulation is cardiac resynchronisation (CRT-P), which will be accompanied by defibrillation (CRT-D) if FEVI is lower than 35%