Abstract

The function of left ventricular (LV) contractility consists of two aspects, the force of myocardial contraction, which provides a sufficient pressure gradient to open the heart valves, and deformation, which determines the actual cardiac output [1, 2]. The relationship between the characteristics of LV deformation and LV volume parameters remains poorly understood. The LV work may reflect the dependence between the volume and deformation characteristics of the left ventricle. Myocardial work indexes can more accurately describe the systolic LV function when the LV ejection fraction (EF) and global longitudinal strain (GLS) are not informative enough [3, 4]. A new approach was proposed for evaluating the LV pumping function, and a parameter was developed to characterize the efficiency of myocardial work for the cardiac cycle period from the aortic valve opening (AVO) to its closure (AVC), that is, the phase of blood ejection from the left ventricle.

中文翻译：

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一种通过心肌工作评估心脏泵浦功能的新方法。

摘要

左心室（LV）收缩的功能包括两个方面，即心肌收缩的力和变形，变形的力提供了足以打开心脏瓣膜的足够的压力梯度[1，2]。LV变形的特性和LV体积参数之间的关系仍然知之甚少。左室功可反映左心室的体积和变形特征之间的相关性。当左心室射血分数（EF）和整体纵向应变（GLS）不够充分时，心肌工作指标可以更准确地描述收缩期左心室功能[3，4]。提出了一种评估低压泵浦功能的新方法，