TAQUICARDIA TIPO TORCIDA DE PUNTAS SECUNDARIA A PROLONGACIÓN DEL INTERVALO QT POR USO DE AMITRIPTILINA A PROPÓSITO DE UN CASO
Date
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Rev. Méd. La Paz
Abstract
El intervalo QT representa la actividad eléctrica ventricular, tanto la despolarización como la repolarización. Definimos como intervalo QT prolongado a una medida del QT corregido > 450 ms en varones y > 470 ms en mujeres. Se diferencian 2 grandes grupos dentro del síndrome del QT prolongado: el congénito, asociado con mutaciones en determinados genes, y la variante adquirida. El síndrome de QT prolongado es un conjunto de entidades infrecuentes que se manifiestan en el ECG por la prolongación del intervalo QT y la predisposición a la taquicardia ventricular polimórfica. Una de las principales etiologías del síndrome de QT congénito adquirido es el uso de fármacos prolongadores del intervalo QT. En la actualidad la lista de fármacos que pueden prolongarlo a dosis terapéuticas es amplia y está en continuo crecimiento. La prolongación del intervalo QT puede predisponer a la aparición de taquicardia ventricular polimórfica grave denominada torcida de puntas (TdP), cuya aparición no es muy frecuente, pero es causa de muerte súbita. En el presente reporte presentamos un caso de desarrollo de torcida de puntas debido a uso de amitriptilina.
The QT interval representas ventricular electrical activity, both depolarization and repolarization. We define a prolonged QT interval as a corrected QT measurement> 450 ms in men and> 470 Two major groups are distinguished within the long QT syndrome: congenital, associated with mutations in certain genes, and the acquired variant. Long QT syndrome is a rare group of entities that are manifested on ECG by prolongation of the QT interval and predisposition to polymorphic ventricular tachycardia. One of the main etiologies of acquired congenital QT syndrome is the use of QT- prolonging drugs. At present, the list of these is extensive and is constantly growing. Prolongation of the QT interval can predispose to the development of severe polymorphic ventricular tachycardia called torsades de pointes (TdP), which is not a very common presentation but is a cause of sudden death. In this report, we present a case of the development of severe polymorphic ventricular tachycardia due to the use of amitriptyline.
The QT interval representas ventricular electrical activity, both depolarization and repolarization. We define a prolonged QT interval as a corrected QT measurement> 450 ms in men and> 470 Two major groups are distinguished within the long QT syndrome: congenital, associated with mutations in certain genes, and the acquired variant. Long QT syndrome is a rare group of entities that are manifested on ECG by prolongation of the QT interval and predisposition to polymorphic ventricular tachycardia. One of the main etiologies of acquired congenital QT syndrome is the use of QT- prolonging drugs. At present, the list of these is extensive and is constantly growing. Prolongation of the QT interval can predispose to the development of severe polymorphic ventricular tachycardia called torsades de pointes (TdP), which is not a very common presentation but is a cause of sudden death. In this report, we present a case of the development of severe polymorphic ventricular tachycardia due to the use of amitriptyline.
Description
Vol. 27, No. 2