Idiopathic atrial flutter, high grade atrioventricular block and sino-atrial dysrhythmia in a young man. Effects of exercise testing.
A 25-year-old man with idopathic atrial flutter and high grade atrioventricular (AV) block is described. Postcardioversion, sino-atrial (SA) and AV nodal dysrhythmias occurred. Treadmill exercise during atrial flutter increased AV conduction to 2:1, and normalized SA and AV nodal function following cardioversion. A neurogenic basis for these arrhythmias is hypothesized.
D000328:Adult; D001146:Arrhythmia, Sinus / Q000150:complications*; D001145:Arrhythmias, Cardiac / Q000150:complications* / Q000175:diagnosis / Q000209:etiology; D001282:Atrial Flutter / Q000150:complications*; D004554:Electric Countershock; D004562:Electrocardiography; D005080:Exercise Test; D005260:Female; D006327:Heart Block / Q000150:complications*; D006801:Humans; D008297:Male