A 34-year-old member asked:
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how come there is no p wave in ventricular fibrillation?

2 doctor answers
Dr. Randy Kiewe
26 years experience Cardiology
P waves are atrial: "p" wave are a finding on the ECG (electrocardiogram) which represents atrial contraction. During ventricular fibrillation there is no organized atrial activity and therefore there will be no P wave generated.
Answered on Feb 18, 2015
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Dr. Calvin Weisberger
50 years experience Cardiology
ECG : There may actually be a P wave in some vfib. You won't see it because of the vfib waves.
Answered on Feb 18, 2015

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