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- W1975817068 abstract "Echocardiography has been found useful in the preoperative prediction of the severity of obstruction in patients with aortic stenosis. To assess its role as an index of peak left ventricular systolic pressure in patients with surgically treated left ventricular outflow obstruction, 16 patients were evaluated with both echocardiography and cardiac catheterization after aortic valve surgery. In addition, 19 other patients with aortic stenosis were studied before surgery to review the preoperative use of the current echocardiographic formulas. These formulas provided reliable preoperative prediction of peak left ventricular systolic pressure (r = 0.90, P < 0.001), but postoperative predicted left ventricular systolic pressure derived from either end-systolic or end-diastolic formulas correlated poorly with postoperative peak left ventricular systolic pressure measured at cardiac catheterization. Left ventricular posterior wall dimension remained significantly enlarged as long as 122 months after surgery for left ventricular outflow obstruction and contributed to the postoperative echocardiographic overestimation of peak left ventricular systolic pressure. Left ventricular cavity dimension was not significantly altered postoperatively. These data indicate that currently applied echocardiographic formulas remain of value in the preoperative evaluation of patients with aortic stenosis but are not reliable in the postoperative period. These findings also suggest that the course of regression of myocardial hypertrophy after relief of left ventricular outflow obstruction, as reflected in left ventricular posterior wall dimension, may be less complete in man than it appears to be in animal models." @default.
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- W1975817068 date "1979-01-01" @default.
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- W1975817068 title "Role of echocardiography in aortic stenosis: Pre- and postoperative studies" @default.
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- W1975817068 doi "https://doi.org/10.1016/0002-9149(79)90046-8" @default.
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