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Global longitudinal strain: is it a superior assessment method for left ventricular function in patients with chronic mitral regurgitation undergoing mitral valve replacement?

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Indian Journal of Thoracic and Cardiovascular Surgery Aims and scope Submit manuscript

Abstract

Purpose

Left ventricular ejection fraction may remain normal or even higher despite significant impairment of contractility in cases of mitral regurgitation. The aim of this study is to evaluate the changes in left ventricular function after mitral valve replacement and to study the role of global longitudinal strain in detecting early left ventricular dysfunction using speckle tracking.

Method

Study involved 31 patients who underwent mitral valve replacement for mitral regurgitation. Patient’s preoperative and postoperative echocardiography (conventional parameters and global longitudinal strain) and other parameters like functional status, radiological findings, and electrocardiogram were recorded to evaluate left ventricular function.

Results

All patients presented in advanced stage with New York heart association class III (67.7%) and IV (32.3%). There was significant decline in left ventricular ejection fraction (with the mean value from 64.58 to 40.13%) and global longitudinal strain (− 15.57 ± 4.98to  8.97) in the immediate postoperative period (~ 7 days). However, there was a rise in both left ventricular ejection fraction (mean 52.48%) and in global longitudinal strain (mean − 14.44 ± 3.67) at 3 months. Left ventricular and atrial size decreased significantly immediately after surgery, which further declined at 3 months. We also found that patients who attained a left ventricular ejection fraction of > 50% in postoperative period had better left ventricular ejection fraction and global longitudinal strain preoperatively. In addition, they had smaller cardiac size and milder pulmonary hypertension comparatively.

Conclusions

Mitral valve replacement in mitral regurgitation results in decline in left ventricular function immediately after surgery. In patients with chronic mitral regurgitation, left ventricular ejection fraction is fallacious and global longitudinal strain can be an important tool to assess left ventricular ejection fraction.

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Correspondence to Sarvesh Kumar.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of King George’s Medical University, U.P. Institutional ethical committee, (Ref. code: 89 ECM IIB-thesis /P51) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Singh, V., Kumar, S., Bhandari, M. et al. Global longitudinal strain: is it a superior assessment method for left ventricular function in patients with chronic mitral regurgitation undergoing mitral valve replacement?. Indian J Thorac Cardiovasc Surg 36, 119–126 (2020). https://doi.org/10.1007/s12055-019-00854-7

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