Case reports of phase 4 paroxysmal atrioventricular block.
Four cases of PAVB were reported, 3 of which manifested third-degree AV block, while one exhibited first-degree AV block, while one exhibited first-degree AV block. The location and mechanism of establishment and disappearance of PAVB was discussed. It was speculated that, in some cases, concealed conduction of P waves could promote depolarization of the injured area which displayed Phase 4 block and thus temporarily restore 1.1 AV conduction.
D000328:Adult; D000368:Aged; D003327:Coronary Disease / Q000150:complications / Q000175:diagnosis; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis*; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D009205:Myocarditis / Q000150:complications / Q000175:diagnosis; D012804:Sick Sinus Syndrome / Q000150:complications / Q000175:diagnosis