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Impact of chamber geometry and gender on left ventricular systolic function in patients > 60 years of age with aortic stenosis.
American Journal of Cardiology 1994 October 16
In aortic stenosis, gender and other differences in the adaptive remodeling of the left ventricle have been described, but the influence of left ventricular (LV) geometry on systolic function is not widely appreciated. This study tested the hypothesis that the increased ejection fraction seen in some elderly women with aortic stenosis is due to changes in LV geometry, not increased myocardial mass or enhanced myocardial function. We therefore investigated gender-related differences in LV and myocardial function by analysis of end-systolic circumferential stress versus shortening relations in 65 patients (29 men and 36 women) with aortic stenosis who underwent cardiac catheterization and echocardiography. Despite similar degrees of aortic stenosis, there were significant differences between men and women with regard to LV geometry and function. When compared with men, women had higher peak LV pressures (205 +/- 27 vs 188 +/- 27 mm Hg, p < 0.01), higher ejection fractions (66 +/- 14% vs 57 +/- 18%, p < 0.05), smaller LV end-diastolic dimensions (43 +/- 8 vs 51 +/- 6 mm, p < 0.01) and higher relative wall thickness (0.66 +/- 0.27 vs 0.50 +/- 0.10, p < 0.01). LV mass was similar in the 2 groups. Mean values for stress were lower in women and there was a predominance of women at extremely low levels of stress; this subgroup had very high values for relative wall thickness and endocardial shortening, but overall stress-shortening relations were normal.(ABSTRACT TRUNCATED AT 250 WORDS)
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