What is described as monomorphic V Tach?

Monomorphic V Tach, or monomorphic ventricular tachycardia, is characterized by QRS complexes that have a uniform appearance. This means that all the QRS complexes in this rhythm look the same, reflecting a single electrical impulse originating from the same point in the ventricles. The consistency in shape indicates that the disturbances in ventricular depolarization are coming from a single focus, which can be crucial for diagnosis and management.

In contrast, differing shapes in V Tach would indicate a polymorphic ventricular tachycardia, where multiple foci or mechanisms are at play. Frequent PVCs without a pattern don’t fit the definition of V Tach since they are typically isolated and come less frequently rather than forming a sustained tachycardic rhythm. Similarly, PVCs occurring in triplet do not describe a continuous tachyarrhythmia but rather isolated events that might suggest a different type of arrhythmia, not necessarily V Tach.

Therefore, the definition of monomorphic V Tach hinges on the uniformity of the QRS complexes, confirming that the correct answer is a uniform appearance in the QRS morphology.