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RISS 인기검색어
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- 저자 : 조정관(J. K. Cho) (검색결과 2 건)
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길광채,조정관,강정채 대한내과학회 1990 대한내과학회지 Vol.38 No.5
The clinical application and usefulness of various electrocardiographic findings have been verified, but the normal and abnormal configurations of the right chest leads electrocardiogram(ECG) is still to be determined. In order to present normal reference data of a right precordial ECG, 100 normal adults were examined by 12 conventional leads and additional right precordial leads(V3R, V4R, V5R and V6R) ECG. The QRS morphologies, amplitudes, r/s ratio and deviation of the ST segments from the baseline were analyzed. The most frequently recoreded QRS configurations were the rS or rSr' patterns with 98% in V3R and 92% in V4R. The qs configuration was rarely observed with 2% in V3R and 8% in V4R. But in the right lateral leads it was much more freguently observed, with 25% in V5R and 41% in V6R. In one case, the qs pattern was recorded in all the right precordial leads. The mean amplitudes of r waves were 2.2±1.2㎜ in V3R, 1.3±0.7㎜ in V4R, 1.0±0.5㎜ in V5R and 0.8±0.3㎜ in V6R. The mean amplitudes of the S waves were 6.2±2.4㎜ in V3R, 3.4±1.2㎜ in V4R, 2.9±1.1㎜ in V5R and 3.1±1.㎜ in V6R. The mean r/s ratio in the right precordial leads was less than 0.5, but in 4% of the cases the r was taller than s in V4R. The T waves were usually inverted or flat forms. There was no case showing ST segment deviations more than 1㎜ from the isoelectric line in V4R, V5R and V6R and only one case in V3R. The mean ST segment deviation was 0.3±0.3㎜ at 40 msec, 0.4±0.7㎜ at 80 msec after the end of QRS in V3R, and 0.1±0.2㎜ at 40 msec and 0.1±0.2㎜ at 80 m sec in V4R. The above results suggest that the normal right precordial QRS morphology is the rS or rSr' pattern, with an r/s ratio<1, that T waves are usually inverted or flat, and that the ST segment deviation of more than 1㎜ is not a normal finding.
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