|
KMID : 0438219740110021099
|
|
Korea University Medical Journal
1974 Volume.11 No. 2 p.1099 ~ p.1130
|
|
|
Studies on the QRS Complex in Koreans
|
|
|
|
|
Abstract
|
|
|
Author analysed the QRS complex, particuarly QRS vector and partial bilateral bundle branch block in 93 cases of, normal adults and 527 cases of abnormal ECGs and diseases, such as bundle branch block, W-P-W syndrome, hypertensive heart disease, aortic insufficiency, mitral stenosis, cor pulmonale, ventricular septal defect, myocardial infarction, angina pectoris and myocardiopathy according to various criteria. The ECGs were analysed using magnifying lens and following results were obtained. .
1. QRS interval in normal person was 0.049-0.112 second and incidence of Qwave was 44.1 % in lead 1, 52.7% in lead 2 and 55.9% in lead 3. Amplitude of R-waves in standard lead was 0.623.0 mm, duration of R-wave 0.020-0.096 second. Incidence of S-wave in standard lead was 66.7% in lead 1, 54.8% in lead 2 and 39.8% in lead 3 and amplitude of S-wave was 0.5-6.0 mm.
2. T/R ratio in normal person was 0.03-1.33 in standard lead, and R/S ratio in V, 0.39(0.06-1.17) VAT in V, was 0.008-0.040 second and 0.020-0.046 second in Vs. 1 6
3. Mean QRS vector in normal person was +65.6318.22 degree, average vectors of initial 0.04 second +57.9821.02 degree, average vectors of terminal 0.04 second +74.7250.40 degree and angle between average vectors of initial and terminal 0.04 second was 37.5636.06 degree.
4. R,+S, in normal person was 5.453.45(1.019.5)mm, Rvsol6+Sv,, 25.057.64(13.542.0)mm and Rvl+ Sv5c16, 6.313.18(015.0)mm.
5. Sokolow-Lyon´s Rvr, 016 26mm criteria of left ventricular hypertrophy was the most reliabe voltage criteria. The criteria of Rvs o1 6 +Sv, over 43 mm in male and over 38mm in female were reliable for the ECG diagnosis of left ventricular hypertrophy in Koreans and Sokolow-Lyon´s criteria
of R/S? 1 in V, for right ventricular hypertrophy in Koreans.
6. Systolic overloading pattern of left ventricle was observed in hypertensive heart disease. Systolic overloading pattern of right ventricle was observed in mitral stenosis and cor pulmonale and diastolic overloading in atrial septal defect. However systolic overloading patterns were seen in 8.3% of arotic insufficiency.
7. QS pattern in VI, 2 was observed in myocardial infarction, cor pulmonale and mitral stenosis. The S, Sz S, syndrome was observed in myocardial infarction, and rSR´ pattern in V, was observed in right bundle branch block, mitral stenosis and cor pulmonale.
8. In 8 cases of W-P-W syndrome, A type was 3 cases and B type was 5 cases. Mean electrical axis of QRS was +68^-+98 degree in A type and -11^-52 degree in B type.
9. The incidence of left axis deviation of QRS vector was very low in left ventricular hypertrophy but was relatively high in conduction disturbances. The right axis deviation of QRS vector was seen in right ventricular hypertrophy as well as in conduction disturbances.
10. There were 16 cases (0.26%) of partial bilateral bundle branch block among 6,000 ECGs and there were 5 cases of RBBB with left anterior hemiblock, 10 cases of RBBB with left posterior hemiblock and 1 case of CLBBB with first degree of A-V block.
11. There were 3 cases of partial bilateral bundle branch block among 46 cases of first degree of A-V block and 1 cases among 3 cases of complete A-V block.
12. There were 7 cases(18.4%) of peri-infarction block in 38 cases of myocardial infarction and 5 of 7 cases were anterolateral peri-infarction block and 2 cases were diaphragmatic peri-infarction block.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|