自动心肌运动定量技术评价射血分数保留型频发室性早搏患者左室收缩功能的价值

doi:10.3969/j.issn.2095-9400.2021.04.004

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Abstract Objective: To explore the value of automated cardiac motion quantification (aCMQ) in evaluating left ventricular systolic function of frequent premature ventricular contractions (frequent PVCs) patients with ejection fraction preserved. Methods: From January 2018 to January 2019, 34 cases of frequent PVCs with ejection fraction preserved (LVEF>50%) were enrolled. At the same time, 27 healthy persons matched by sex were selected as the control group. The left atrial size (LAD), left ventricular end diastolic diameter (LVIDd), left ventricular end systolic diameter (LVIDs), left ventricular ejection fraction (LVEF) and diastolic function parameters (E/A and E/E’a, E’a referring to the average mitral annulus velocity of lateral and septal sides) were measured by conventional echocardiography. The main outcome assessments obtained by aCMQ technique were longitudinal strains of apex two-chamber view (AP2LS), apex three-chamber view (AP3LS), apex four-chamber view (AP4LS) and global longitudinal strain (LVGLS). Circumferential strains in three different levels of left ventricular in short axis, including basal level (SAXBCS), mid level (SAXMCS), apical level (SAXACS) and global circumferential strain (LVGCS) were also obtained. Results: There was no significant difference in age and body surface area between frequent PVCs group and control group (P>0.05). There was significant difference in LVIDd and LVIDs between the two groups (all P<0.05), but no significant difference in LAD, LVEF, E/A and E/E’a (all P>0.05). The absolute values of AP2LS, LVGLS and SAXMCS in frequent PVCs group were lower than those in the control group, showing significant differences (all P<0.05). ROC curve analysis showed AP2LS and LVGLS had a better predictive value for LV systolic dysfunction in frequent PVCs patients. Conclusion: ACMQ can detect the early subtle changes of cardiac function in frequent PVCs, and it can be used as a new method to detect the subtle LV dysfunction.

Key words： speckle tracking imaging ventricular function, left frequent premature ventricular contractions

Received: 16 May 2020

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	XIAO Lili
	SONG Jing
	CHEN Xiaole
	LIN Lingling
	DONG Yanyan
	WU Daozhu

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https://xb.wmu.edu.cn/EN/10.3969/j.issn.2095-9400.2021.04.004 OR https://xb.wmu.edu.cn/EN/Y2021/V51/I4/276

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