atrioventricular block

(redirected from first-degree AV block)
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Related to first-degree AV block: Second degree AV block
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Noun1.atrioventricular block - recurrent sudden attacks of unconsciousness caused by impaired conduction of the impulse that regulates the heartbeatatrioventricular block - recurrent sudden attacks of unconsciousness caused by impaired conduction of the impulse that regulates the heartbeat
arrhythmia, cardiac arrhythmia - an abnormal rate of muscle contractions in the heart
References in periodicals archive ?
First-degree AV block and Mobitz type I 2nd-degree AV block are common manifestations.
First-degree AV block occurs when all SA node-originated impulses are conducted from the atria to the ventricles, but the conduction is delayed (prolonged PR interval).
Now a study in the June 24, 2009 issue of the Journal of the American Medical Association (JAMA) has found first-degree AV block may increase the risk for atrial fibrillation (AF), need for pacemaker or death.