A Study on the Systolic Time Intervals in Normal Children.
10.4070/kcj.1982.12.1.77
- Author:
Yong Soo YOON
;
Chang Yee HONG
- Publication Type:Original Article
- MeSH:
Child*;
Electrocardiography;
Female;
Heart;
Heart Rate;
Humans;
Male;
Sex Characteristics;
Systole*
- From:Korean Circulation Journal
1982;12(1):77-88
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The systolic time intervals were measured on 388 normal chidren, ranging from 8 months to 15years of age by using simultaneous recordings of the electrocardiogram, phonocardiogram and carotid or axillary arterial pulse. The statistical methods were applied to study the influence of age, sex and heart rate(HR) on these intervals. The results were as follows. 1. The regression equation of QS2was -1. 60HR+480+/-16 msec in males and -1.68HR+492+/-15 msec in females, respectively. 2. The regression equation of LVET was -1. 13 HR+359+/-10 msec in males and -1.21 HR+369+/-13 msec in females, respectively. 3. The regression equation of PEP was -0.58 HR+133+/-9 msec in males and -0.58 HR+128+/-9 msec in females, respectively. 4. The PEP/IVET ratio was 0.29+/-0.04 in males and 0.30+/-0.06 in females. 5. There was no sex difference in various systolic time intervals, and age had a slight influence but it was negligible for clinical use. 6. According to the regression equations of QS2, LVET, and PEP to the heart rate, QS2, and LVET were found to be more inversely correlated with heart rate than PEP.
