Analysis of arrhythmias and electrocardiographic changes in patients with systolic heart failure

doi:10.3969/j.issn.1672-5301.2017.02.015

Abstract：Objective The purpose of this study is to find common arrhythmias and electrocardiographic changes in patients with systolic heart failure.Methods The electrocardiograms(ECGs) of 94 patients admitted to our hospital who had systolic heart failure with ejection fraction (EF)＜50％ on echocardiogram were collected and retrospective studied.The patients were divided into two groups:one with EF ≤ 35％ and the other with EF＞35％,based on EF.Twelve leads ECG of these patients was reviewed to identify common arrhythmia and demographic variables;laboratory results were compared to identify the differences.Results A total of 94 patients with systolic heart failure,31 had an EF≤35％.Hypertension 52.1％,diabetes 29.8％,coronary artery disease 25.5％,dilated cardiomyopathy 23.4％,chronic kidney disease 12.8％ and stroke 9.5％ are common associated comorbidities.On analysis of EKG,24.7％ had tachycardia,23.7％ had wide QRS＞120 ms,51.1％ had prolonged corrected QT (QTc).The most common arrhythmias were atrial fibrillation and ventricular premature contractions which were found in 26.8％ and 25.8％,respectively.Other common arrthymias were atrial premature contractions 18.3％,sinus tachycardia 16.1％,right bundle branch block 7.5％ left bundle branch block 5.3％.Patients with severe systolic heart failure had prolonged QRS (P＜0.01) and prolonged QTc (P=0.008) as compared to the other group.Conclusion Atrial fibrillation and ventricular premature contractions were common arrhythmias in patients with systolic heart failure.Patients with severe systolic heart failure had statistically significant prolongation of the QRS duration and QTc interval.