Effect of exercise on cycle length in atrial flutter

OBJECTIVE--To examine the effect of exercise on cycle length in atrial flutter. PATIENTS--15 patients with chronic atrial flutter. Seven patients were taking digoxin and six verapamil; two were not taking medication. METHODS--All patients underwent bicycle ergometry. Flutter cycle length was measure...

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Bibliographic Details
Published in:British Heart Journal 1995-03, Vol.73 (3), p.263-264
Main Authors: van den Berg, M. P., Crijns, H. J., Szabó, B. M., Brouwer, J., Lie, K. I.
Format: Article
Language:English
Subjects:
Adult
Atrial Flutter - drug therapy
Atrial Flutter - physiopathology
Biological and medical sciences
Cardiac dysrhythmias
Cardiology. Vascular system
Digoxin - therapeutic use
Electrocardiography
Exercise - physiology
Female
Heart
Humans
Male
Medical sciences
Verapamil - therapeutic use
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Summary:OBJECTIVE--To examine the effect of exercise on cycle length in atrial flutter. PATIENTS--15 patients with chronic atrial flutter. Seven patients were taking digoxin and six verapamil; two were not taking medication. METHODS--All patients underwent bicycle ergometry. Flutter cycle length was measured at rest and at peak exercise. RESULTS--Mean flutter cycle length increased from 245 ms to 256 ms (P = 0.002). Six patients developed 1:1 atrioventricular conduction. Significant increases in flutter cycle length were observed irrespective of development of 1:1 atrioventricular conduction and use of digoxin and verapamil. CONCLUSION--Exercise prolongs flutter cycle length. This effect would promote development of 1:1 atrioventricular conduction during exercise, causing inordinately high ventricular rates.
ISSN:0007-0769
1355-6037
1468-201X
2053-5864
DOI:10.1136/hrt.73.3.263