TY - JOUR
T1 - Effects of exercise on left ventricular diastolic performance in trained athletes
AU - Nixon, J. V.
AU - Wright, Alasdair R.
AU - Porter, Thomas R.
AU - Roy, Valerie
AU - Arrowood, James A.
N1 - Funding Information:
From the Echocardiography Laboratories, Division of Cardiology, Medical College of Virginia, and the Athletic Department, Virginia Commonwealth University, Richmond, Virginia. This study was supported in part by National Research Service Awards HL-07580 and HL-07357 from the National Heart, Lung, and Blood Institute, Bethesda, Maryland, by the A.D. Williams Foundation of the Medical College of Virginia, and by the National Collegiate Athletic Association. Manuscript received February 8, 1991; revised manuscript received May 30, 1991, and accepted May 31.
PY - 1991/10/1
Y1 - 1991/10/1
N2 - Dynamically trained athletes develop increased left ventricular (LV) wall mass. To determine whether this increased wall mass impaired characteristics of LV diastolic filling, serial Doppler echocardiograms were obtained from 10 trained athletes (mean age 21 years) at rest, during supine graded bicycle exercise and during recovery at heart rates of 80, 120 and 140 beats/min, respectively. Similar studies were obtained in 10 age-matched control subjects. Studies at rest showed significant increases in athletes in LV end-diastolic dimension and indexed LV wall mass. Differences in peak filling rates and in normalized peak lengthening rates between athletes and control subjects were seen at heart rates of 140 beats/min during exercise and recovery. Differences in Doppler-derived variables between athletes and control subjects were seen in total time-velocity integral, early peak filling velocity and E A ratio. In athletes, time-velocity integral was increased during recovery at heart rates of 120 beats/min and 80 beats/min, early peak filling velocity was increased during exercise at 120 beats/min and during recovery at 120 beats/min and 80 beats/min, and E A ratio was higher at all heart rates during both exercise and recovery. Although no significant differences were found in LV diastolic filling indexes at rest, a significant enhancement was found in these parameters in dynamically trained athletes during exercise, particularly at higher levels of dynamic exercise.
AB - Dynamically trained athletes develop increased left ventricular (LV) wall mass. To determine whether this increased wall mass impaired characteristics of LV diastolic filling, serial Doppler echocardiograms were obtained from 10 trained athletes (mean age 21 years) at rest, during supine graded bicycle exercise and during recovery at heart rates of 80, 120 and 140 beats/min, respectively. Similar studies were obtained in 10 age-matched control subjects. Studies at rest showed significant increases in athletes in LV end-diastolic dimension and indexed LV wall mass. Differences in peak filling rates and in normalized peak lengthening rates between athletes and control subjects were seen at heart rates of 140 beats/min during exercise and recovery. Differences in Doppler-derived variables between athletes and control subjects were seen in total time-velocity integral, early peak filling velocity and E A ratio. In athletes, time-velocity integral was increased during recovery at heart rates of 120 beats/min and 80 beats/min, early peak filling velocity was increased during exercise at 120 beats/min and during recovery at 120 beats/min and 80 beats/min, and E A ratio was higher at all heart rates during both exercise and recovery. Although no significant differences were found in LV diastolic filling indexes at rest, a significant enhancement was found in these parameters in dynamically trained athletes during exercise, particularly at higher levels of dynamic exercise.
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U2 - 10.1016/0002-9149(91)90414-G
DO - 10.1016/0002-9149(91)90414-G
M3 - Article
C2 - 1927955
AN - SCOPUS:0026014095
SN - 0002-9149
VL - 68
SP - 945
EP - 949
JO - The American Journal of Cardiology
JF - The American Journal of Cardiology
IS - 9
ER -