Relationship Between QRS Duration on ECG and LV Systolic Function by Echocardiography in Patients with STEMI

Abstract

Background: Acute STEMI patients constitute a large proportion of admissions in coronary care unit and their management and prognostic implification is of immense importance. Prolonged QRS duration on electrocardiogram (ECG) has been associated with cardiac structural and functional abnormalitiesVery few studies were performed correlating QRS duration and LV systolic function in acute STEMI patients in our country. This study assessed whether QRS duration on ECG is correlated with LV systolic function measured in patients with acute STEMI. Aim of the Study: The aim of the study is to evaluate the relationship between QRS duration on ECG with left ventricular systolic function by echocardiography in patients with acute ST elevation myocardial infarction. Methods: A cross sectional observational study was conducted in the department of Cardiology in Mymensingh Medical College Hospital from November, 2016 to February, 2018 among purposively selected 235 patients with STEMI following inclusion & exclusion criteria. After detailed history, physical examination and investigations the selected patients underwent transthoracic Echocardiography to asses left ventricular systolic function applying Teichholz method. Results: Mean age of the patients 51.84±11.74 years. 135(57.45%) patients had acute anterior MI, while 98(41.70%) had Inferior MI and only 2(0.85%) had lateral MI. Mean QRS duration was 93.3 ±10.18 ms, with maximum value 125ms and minimum value 66ms. Mean left ventricular ejection fraction was 49.71%±9.87%, with maximum value 74% and minimum value 23%. QRS duration and left ventricular ejection fraction were moderate negative correlation with r= -0.611,

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STEMI患者心电图QRS持续时间与超声心动图左室收缩功能的关系

背景:急性STEMI患者在冠状动脉监护室的入院中占很大比例，他们的管理和预后意义非常重要。心电图QRS持续时间延长与心脏结构和功能异常有关，但我国对急性STEMI患者QRS持续时间与左室收缩功能的相关性研究甚少。本研究评估心电图QRS持续时间是否与急性STEMI患者左室收缩功能相关。研究目的:探讨急性ST段抬高型心肌梗死患者超声心动图QRS时间与左室收缩功能的关系。方法:于2016年11月至2018年2月在Mymensingh医学院附属医院心内科进行横断面观察研究，有目的选择235例STEMI患者，符合纳入和排除标准。经详细病史、体格检查和调查后，选择患者行经胸超声心动图，应用Teichholz法评估左心室收缩功能。结果:患者平均年龄51.84±11.74岁。急性前路心肌梗死135例(57.45%)，下路心肌梗死98例(41.70%)，外侧心肌梗死2例(0.85%)。QRS平均持续时间为93.3±10.18 ms，最大值为125ms，最小值为66ms。平均左室射血分数为49.71%±9.87%，最大值74%，最小值23%。QRS持续时间与左室射血分数呈中度负相关(r= -0.611，

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