RT Journal Article
SR Electronic
T1 Effect of exercise on cycle length in atrial flutter.
JF British Heart Journal
JO Heart
FD BMJ Publishing Group Ltd and British Cardiovascular Society
SP 263
OP 264
DO 10.1136/hrt.73.3.263
VO 73
IS 3
A1 van den Berg, M. P.
A1 Crijns, H. J.
A1 Szabó, B. M.
A1 Brouwer, J.
A1 Lie, K. I.
YR 1995
UL http://heart.bmj.com/content/73/3/263.abstract
AB 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.