Nghiên cứu rối loạn nhịp thất trên Holter điện tim và mối liên quan với điện thế muộn ở bệnh nhân thiếu máu cơ tim cục bộ

Abstract

Objective: To study ventricular arrhythmias and the relationship with late potentials in patients with coronary artery disease (CAD). Subject and method: A descriptive, cross-sectional study. Using signal-averaged electrocardiogram on 162 patients with coronary artery disease treated at 108 Military Central Hospital from September 2016 to October 2018. Result: The frequency of ventricular ectopic was 94.4%, of which severe ventricular arrhythmias (Lown 3-5) accounted for 34.0%. The rate of abnormal late potential was 38.3%. There was a relationship between late potential and complex ventricular arrhythmias (OR = 23.82, p<0.05). If the late potential was abnormal, the risk of complicated ventricular arrhythmia was more likely (72.6%), whereas if the late voltage was normal, there was only 10.0% risk of complicated ventricular arrhythmia. Conclusion: Late potential was associated with ventricular arrhythmias, sensitivity of 81.8% and specificity of 84.1%. In abnormal late potential group: 72.6% had ventricular arrhythmias, while in normal late potential group severe ventricular arrhythmias was rare (10%). Normal late potentials results rule out the risk of dangerous arrhythmias without further intervention.