الفهرس 
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Abstract
IA Wu May, MI 4ifterent non invasive methods employed in the assessment of left ventricular funs ctionsbefore and after aortic valve replacement had
been surveyed. In 32 patients with aortic valve disease undergoing valve replacement, all the following inve-stigations were performed in the pre-and postoperative periods:
1.Cheat xpray.
2.Electrocardiogram.
3.Total CPS and 11B-CPS isoenzyme.
4.Echocardiogram.
5.Apexacardiogral: 6, Phonooardiogram. 7. Systolic time intervals.
Prom this study we can conclude that (1) At similar functional impairment according to the MYRA classification, left ventricular contractile func-tion is more severely impaired in aortic regurgita-tion than in aortic regurgitation + aortic stenosis. (2) Left ventricular function improves significantly after aortic valve replacement in these two forms of aortic valve disease (3) Residual and functional impairment is greater in Aortic regurgitation than
in aortic) stenosis or Aortic stenosis + regurgitation.
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3o, if aortic valve replacement is successful and uncomplicated, patients experience an imerove-
ment in the symptomatic state and, therefore, in the
quality of life. The compensatory mechanisms of left ventricular hypertrophy and/or dilatation will re-
gress, eh4 the impaired ventricular performance will
improve.