Exercise induced "Mobitz type II" second degree AV block in a patient with chronic bifascicular block (right bundle branch block and left anterior hemiblock).
A 55 year old healthy man with chronic bifascicular block (right bundle branch block and left anterior hemiblock) had a near syncopal episode. A treadmill test showed exercise induced Mobitz type II AV block manifested clinically by paradoxical slowing of the heart rate and decreased blood pressure. True His Purkinje block and pseudo AV block due to His extrasystoles were documented by an electrophysiological study.
D001794:Blood Pressure; D002036:Bundle of His / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000150:complications* / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D004562:Electrocardiography; D005080:Exercise Test; D006327:Heart Block / Q000150:complications / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged