摘要
To the Editor： Moderator band （MB） is a part of the septomarginal trabeculation, which not only supports the anterior papillary muscle （APM） of the tricuspid valve but also connects it to the flee wall. Nevertheless, with the advent of intracardiac echocardiography （ICE）, electrophysiologists are now aware of the arrhythmogenic role of MB besides its mechanical function. MB-originated ventricular tachycardia or ventricular fibrillation （VT/VF） is a kind of idiopathic malignant arrhythmia in the absence of structural heart disease, which is frequently triggered by a premature ventricular contraction （PVC） from the same site.
To the Editor： Moderator band （MB） is a part of the septomarginal trabeculation, which not only supports the anterior papillary muscle （APM） of the tricuspid valve but also connects it to the flee wall. Nevertheless, with the advent of intracardiac echocardiography （ICE）, electrophysiologists are now aware of the arrhythmogenic role of MB besides its mechanical function. MB-originated ventricular tachycardia or ventricular fibrillation （VT/VF） is a kind of idiopathic malignant arrhythmia in the absence of structural heart disease, which is frequently triggered by a premature ventricular contraction （PVC） from the same site.
