What QRS duration characterizes pulseless ventricular tachycardia on ECG?

What QRS duration characterizes pulseless ventricular tachycardia on ECG?

• A. 0.12 seconds or more
• B. 0.06 seconds
• C. 0.20 seconds
• D. 0.04 seconds

Answer: (A)

A wide QRS complex signals ventricular origin, which is what pulseless ventricular tachycardia shows on ECG. Normal QRS duration is about 0.10 seconds or less; when the QRS width reaches 0.12 seconds or longer, the complex is considered wide, indicating the ventricles are activated abnormally rather than through the normal conduction system. This wide, irregularly shaped or rapid complex is characteristic of VT, including the pulseless form, which is a shockable rhythm in ACLS. Shorter, narrow QRS durations reflect supraventricular activity with normal conduction and do not fit ventricular tachycardia.

A wide QRS complex signals ventricular origin, which is what pulseless ventricular tachycardia shows on ECG. Normal QRS duration is about 0.10 seconds or less; when the QRS width reaches 0.12 seconds or longer, the complex is considered wide, indicating the ventricles are activated abnormally rather than through the normal conduction system. This wide, irregularly shaped or rapid complex is characteristic of VT, including the pulseless form, which is a shockable rhythm in ACLS. Shorter, narrow QRS durations reflect supraventricular activity with normal conduction and do not fit ventricular tachycardia.