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[Myocardial structure and left ventricular function in aortic valvular diseases].

¹Second Department of Surgery, Okayama University Medical School, Japan.

[Zasshi] [Journal]. Nihon Kyobu Geka Gakkai

|November 1, 1992

Summary

Left ventricular mass index and myocardial structure predict the reversibility of left ventricular function after aortic valve replacement in patients with aortic stenosis and aortic regurgitation.

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Area of Science:

Cardiology
Cardiac Surgery
Pathology

Context:

Aortic stenosis (AS) and aortic regurgitation (AR) are significant valvular heart diseases.
Left ventricular (LV) function and structure are crucial in assessing disease severity and prognosis.
Understanding the relationship between myocardial changes and LV function is vital for treatment planning.

Purpose:

To investigate the correlation between myocardial structure and left ventricular (LV) function in patients with AS and AR.
To assess the predictive value of preoperative myocardial parameters for the reversibility of LV function after aortic valve replacement.

Summary:

This study analyzed 13 patients with AS and 19 with AR, correlating echocardiographic LV parameters with myocardial biopsy findings before and after aortic valve replacement.

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In AS, LV mass index (LVMI) correlated positively with muscle fiber diameter and myofibril volume fraction, negatively with LV function. In AR, LVMI correlated positively with interstitial fibrosis, negatively with LV function.

Preoperative LVMI and specific morphologic parameters (fiber diameter in AS, fibrosis in AR) were identified as predictors of irreversible LV dysfunction post-surgery.

Impact:

The findings highlight the utility of preoperative LVMI and myocardial morphologic assessments in predicting postoperative LV function outcomes.
This can aid in patient selection and surgical planning for aortic valve replacement.
Provides insights into the structural basis of diastolic and systolic dysfunction in AS and AR.