Circadian variation of idiopathic ventricular tachycardia originating from right ventricular outflow tract.
We determined circadian variation of isolated ventricular premature complexes (VPCs), 2 to 4 consecutive VPCs, and ventricular tachycardia (5 consecutive VPCs) originating from the right ventricular outflow tract in patients without apparent structural heart diseases. There was apparent circadian variation with 2 prominent peaks for these ventricular arrhythmias, and blockade abolished ventricular tachycardia and attenuated the circadian variation of consecutive VPCs.
The Second Department of Internal Medicine, Toyama Medical and Pharmaceutical University, Japan.
H
H
Hayashi
A
A
Fujiki
M
M
Tani
M
M
Usui
K
K
Mizumaki
M
M
Shimono
H
H
Nagasawa
H
H
Inoue
D000328:Adult; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D002940:Circadian Rhythm; D015716:Electrocardiography, Ambulatory; D005260:Female; D006339:Heart Rate; D006801:Humans; D011433:Propranolol / Q000627:therapeutic use; D013564:Sympathetic Nervous System / Q000503:physiopathology; D017180:Tachycardia, Ventricular / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*; D018879:Ventricular Premature Complexes / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology*
D000889:Anti-Arrhythmia Agents; D011433:Propranolol