Question

If a flutter or sinusoidal wave-form persists for more than __________ seconds in any ECG channel, then the monitor alarms for ventricular fibrillation.

(a) 8 sec

(b) 2 sec

(c) 4 sec

(d) 12 sec

The question was posed to me in semester exam.

Question is taken from Bedside Patient Monitoring System in portion Patient Monitoring System of Biomedical Instrumentation

Answer 1

The correct option is (c) 4 sec

For explanation I would say: A separate detector continuously examines the ECG signal for ventricular fibrillation. If a flutter or sinusoidal wave-form persists for more than 4 seconds in an ECG channel, then the monitor alarms for ventricular fibrillation.