Onset discriminates VT from which rhythm?

Onset discriminates VT from which rhythm?

• A. SVT
• B. AF
• C. VT
• D. NSR

Answer: (A)

In tachyarrhythmia assessment, onset is a practical clue about origin. Ventricular tachycardia often begins abruptly, reflecting sudden activation within the ventricles, whereas supraventricular tachycardia tends to start more gradually as the conduction circuit engages. Because of this pattern, abrupt onset more strongly points to VT when you’re trying to tell VT apart from a supraventricular tachycardia. The other rhythms listed—atrial fibrillation or normal sinus rhythm—aren’t the classic pairing used with onset to distinguish VT, and while AF can be rapid, the established discriminant involving onset is specifically between VT and SVT.

In tachyarrhythmia assessment, onset is a practical clue about origin. Ventricular tachycardia often begins abruptly, reflecting sudden activation within the ventricles, whereas supraventricular tachycardia tends to start more gradually as the conduction circuit engages. Because of this pattern, abrupt onset more strongly points to VT when you’re trying to tell VT apart from a supraventricular tachycardia. The other rhythms listed—atrial fibrillation or normal sinus rhythm—aren’t the classic pairing used with onset to distinguish VT, and while AF can be rapid, the established discriminant involving onset is specifically between VT and SVT.