Changes of Left Ventricular Volume; Mass and Functions after Aortic Valve Replacement
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만성 대동맥판 폐쇄부전증 환자에서 대동맥판 치환술후 좌심실 용적 및 심전도 변화 |
김윤년; 김기식; 송영성; 윤병헌; 윤덕구; 김권배 |
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Abstract |
Left ventncular(LV) hypertrophy is correlated with left ventricular myocardial mass; which occurs after long-standing LV over-loading. It is expected that surgical correction of chronic aortic regurgitation(AR) changes LV loading and then come changes in the LV function; dimension and myocardial mass
Serial electrocardiographic; echocardiographic LV studies were performed in 25 patients before and after aortic valve replacement(AVR) for chronic AR.
Electrocardiographic voltages were reduced significantly in 3 months after AVR(from 58 13土 29 44 to 44 73土 1397(mm)’ P<005)
Left ventricular systolic dimension was lessened markedly in the first 3 months after operation (from 4 55士 1 05 to 3 38+ 0.04(cm); P<005);but diastolic dimension was changed m the first 7 days(from 690土 118 tc 5.34土 0.96(cm);P<0.05)
The thickness of interventrcular septum and LV posterior wall increased after operation but they were not significant statistically
Ejection fraction decreased in the first 7 days after AVR(to 48 88士 15 67(%); P<0 05); after then recovered as in the preoperative state Muscle cross-sectional area was reduced at early post operative period(from 2738±674 to 2426±5 60(cnf)’ P<005) and increased thereafter
Thus; successful AVR for chronic AR results in the normalization of LV function and a decrease in ventriculai hypertrophy; while these changes in the LV function and dimension occur in early postop period |
Key Words:
Aortic valve replacement, Left ventricular function |