Effect of Exercise and Physical Stresses on the Electrocardiogram

운동부하 및 각종 신체조건이 혈압 및 ECG에 미치는 영향 -제2보- (각종 Stress에 의한 심전도 변화)

  • Park, Won-Kyun (Department of Physiology, Keimyung University School of Medicine) ;
  • Chae, E-Up (Department of Physiology, Keimyung University School of Medicine)
  • 박원균 (계명대학교 의과대학 생리학교실) ;
  • 채의업 (계명대학교 의과대학 생리학교실)
  • Published : 1982.12.31

Abstract

We studied this experiment to compare the effects of exercise and other body conditions: i.e., Flack test, cold pressor test and bicycle ergometry on the electrocardiogram. We had sixty healthy college students who were thirty nine men and twenty one women. Their $mean{\pm}SD$ values of physical characteristics were as follows: age; $22.0{\pm}1.4$, weight; men $61.7{\pm}5.6\;kg$, women $46.2{\pm}7.47\;kg$. We observed the changes of P-Q and Q-T interval, R and T amplitude, mean QRS vector, S-T segment deviation, and P and T vector. The result obtained were summarized as follows: P vector was shifted rightward regardless of the type of stress. T vector was shifted var-in each stress but in the bicycle ergometry T vector was shifted leftward. Mean QRS vector was shifted rightward immediately after the bicycle ergometry. Percentage of the occurrence of the depression of S-T segment was 21.7% at the immediately after the submaximal bicycle ergometry in lead II. The elevation of S-T segment was often observed after the mild stresses. Increased amplitude of T wave in the cold pressor test and decreased amplitude of T wave in the bicycle ergometry were observed. In the bicycle ergometry and other stresses, the precise mechanism of S-T segment changes was unexplained but insufficient repolarization in base or apex of the left ventricle due to heart strain was indicated by so called S-T vector analysis.

Keywords