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Meaning of HEART BLOCK

Pronunciation:  hârt blâk

WordNet Dictionary
[n]  recurrent sudden attacks of unconsciousness caused by impaired conduction of the impulse that regulates the heartbeat
 Synonyms: Adams-Stokes syndrome, atrioventricular block, Stokes-Adams syndrome
 See Also: arrhythmia, cardiac arrhythmia



Medical Dictionary
 Definition: interrupted electrical impulse to heart muscles.
Biology Dictionary
 Definition: A heart block is an abnormality of conduction of the electrical heart impulse. Both anatomic or functional imapirment of atrial-ventricular (AV) conduction is contributory. Types:
  1. first degree AV block: P-R interval longer than 0.21 seconds in adults; all supraventricular impulses are conducted
  2. second degree AV block: Mobitz type I (Wenckebach) block: conduction time (P-R interval) is progressively prolonged prior to dropped beats. Mobitz type II conduction time (P-R interval) is not prolonged prior to dropped beats.
  3. third degree AV block: no impulses are conducted.