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The Influence of Structural and Geometrical Parameters of the Left Ventricle on Postoperative Lethality and Hypertrophy Regression after Aortic Valve Replacement
The aim of the investigation is to study the influence of echocardiological parameters of the left ventricle (LV) on lethality and reversion of LV remodelation in the long-term period after aortic valve replacement for aortic valve failure.
Materials and Methods. 154 patients were included into the study: 86 patients with aortic stenosis (56%), 68 — with aortic insufficiency (44%). Echocardiogram consisted of the following measurements: end-diastolic LV dimension, the thickness of posterior wall and interventricular septum. There were determined end-diastolic and end-systolic volumes and ejection fraction, myocardium mass, LV wall relative thickness index.
Results. Four LV structural and geometrical types (SGT) were distinguished. The best results of LV hypertrophy regression were observed in SGT-II group (aortic stenosis with moderate hypertrophy). In hospital period the patients with SGT-III (aortic stenosis with LV marked hypertrophy) and those with SGT-IV (aortic stenosis with LV dilatation) had the same lethality risk. In a long-term period high lethality was revealed in the patients with SGT-IV.
Conclusion. The use of LV structural and geometrical types enables to make prognoses about the risk and the results of aortic valve failure correction.
