Evaluation Of The Ventricular Arrhythmia In Diagnosing Coronary Artery Disease

Objective:To explore the value and practicability of the ventricular arrhythmia in diagnosing coronary artery disease(CAD).Methods:A total of 229 patients with two or more risk factors of CAD underwent coronary angiography(CAG)and ECG were retrospectively analyzed.In all of these patients,there were 127 patients whom have been diagnosed ventricular arrhythmia,and in these patients there were 72 patients whom have been diagnosed positive in ECG exercise testing,and there were 99 patients whom have been diagnosed CAD by CAG also underwent percutaneous transluminal coronary angioplasty(PTCA),Then use the clinic epidemiology method to analyze the sensitivity, specificity,positive predictive value,negative predictive value,Positive likelihood ratio chi-square,and negative likelihood ratio chi-square and prevalence rate of ventricular arrhythmia and ECG exercise testing combination with ventricular arrhythmia.Use the chi-square test to compare the incidence rate of ventricular arrhythmia before and after PTCA.Results:1.Sensitivity and specificity of ventricular arrhythmia were 55.65% and 44.76%.Positive predictive value and negative predictive value was 54.33%and 46.08%,Positive likelihood ratio chi-square and negative likelihood ratio chi-square was 1.01 and 0.99,prevalence rate was 52.7%.2.Sensitivity and specificity of ECG exercise testing combination with ventricular arrhythmia were 74.58%and 45.10%.Positive predictive value and negative predictive value was 61.11%and 60.53%,Positive likelihood ratio chi-square and negative likelihood ratio chi-square was 1.36 and 0.56. 3.The results of chi-square test indicate that incidence rate of ventricular arrhythmia before and after PTCA have no statistical significance.(α=0.05,X~2=2.5,P＞0.05) Conclusion:1.The value of the ventricular arrhythmia in diagnosing coronary artery disease is finite,and the value is relate to prevalence rate of the hospital.2.The value of ECG exercise testing combination with ventricular arrhythmia in diagnosing coronary artery disease is to a certainty.3.PTCA have no influence to incidence rate of ventricular arrhythmia.It is difficult to use the change of incidence rate of ventricular arrhythmia to evaluate whether ischaemic cardiac muscle had benefit from PTCA.