Paradoxical effects of exercise on the QT interval in patients with polymorphic ventricular tachycardia receiving type Ia antiarrhythmic agents.
Paradoxical effects of exercise on the QT interval in patients with polymorphic ventricular tachycardia receiving type Ia antiarrhythmic agents.
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运动对接受 Ia 型抗心律失常药物治疗的多形性室性心动过速患者 QT 间期的反常影响。
DOI:
10.1161/01.cir.81.1.14
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发表时间:
1990
期刊:
影响因子:
37.8
通讯作者:
Levine,JH
中科院分区:
文献类型:
--
作者:
Kadish,AH;Weisman,HF;Veltri,EP;Epstein,AE;Slepian,MJ;Levine,JH
We analyzed the results of exercise testing performed in the absence of all antiarrhythmic drugs in 11 case patients with newly documented polymorphic ventricular tachycardia in response to type Ia antiarrhythmic agents. These results were compared with those found in 11 control patients matched for age, sex, and heart disease to determine whether the response of the QT interval to exercise testing was abnormal in patients who developed worsening of arrhythmia while taking antiarrhythmic drugs. QT, RR, and QTc intervals (by Bazett's method) were evaluated at rest and at 3 minutes of exercise in both groups. At rest, there was no significant difference in the QT interval (410 +/- 13 vs. 386 +/- 11 msec), RR interval (890 +/- 56 vs. 781 +/- 43 msec), or corrected QT interval (438 +/- 10 vs. 438 +/- 4 msec) in the case patients and the control patients. Both groups demonstrated a similar chronotropic response to exercise. The QT interval shortened in both groups with exercise (p less than 0.001), but the degree of shortening tended to be greater in the control patients (to 310 +/- 9 msec) than in the case patients (to 357 +/- 11 msec) (p = 0.06). Thus, there was a paradoxical increase in the QTc interval in the patients who experienced a proarrhythmic effect of type Ia drugs but not in the control patients (to 482 +/- 8 vs. 431 +/- 5 msec; p less than 0.001). Ten of 11 case patients but only one of 11 control patients had an increase in QTc interval of more than 10 msec with exercise (p less than 0.001).(ABSTRACT TRUNCATED AT 250 WORDS)
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DOI:
--
发表时间:
1984
期刊:
The Medical clinics of North America
影响因子:
--
作者:
W. Jackman;Mel Clark;K. Friday;E. Aliot;Jerome L. Anderson;R. Lazzara
通讯作者:
R. Lazzara
影响因子:
4.8
作者:
H. Stratmann;H. Stratmann;H. Kennedy;H. Kennedy
通讯作者:
H. Kennedy
DOI:
10.1016/0002-9149(87)90196-2
发表时间:
1987
期刊:
The American journal of cardiology
影响因子:
--
作者:
Rosen,MR;Wit,AL
通讯作者:
Wit,AL
影响因子:
24
作者:
P. Au;A. Bhandari;R. Bream;D. Schreck;R. Siddiqi;S. Rahimtoola
通讯作者:
S. Rahimtoola
DOI:
10.1056/nejm198808043190501
发表时间:
1988-08
期刊:
The New England journal of medicine
影响因子:
--
作者:
Joseph D. Minardo;J. Heger;W. Miles;D. Zipes;E. Prystowsky
通讯作者:
Joseph D. Minardo;J. Heger;W. Miles;D. Zipes;E. Prystowsky