Is there any difference in cardiogoniometry parameters of ischemic and nonischemic cardiomyopathy in patients with left bundle branch block?

Background: Differentiating ischemic from nonischemic cardiomyopathy is important both prognostically and therapeutically, although it may be difficult clinically. Objectives: We aimed to determine the diagnostic power of Cardiogoniometry (CGM) in the differentiation of the ischemic from the nonischemic etiology of left bundle branch block (LBBB). Patients and Methods: We studied 37 patients with LBBB on the electrocardiogram (ECG) and left ventricular ejection fraction (LVEF) <30%. All of them underwent coronary angiography, and 33 patients were included. Eighteen patients were categorized as the ischemic cardiomyopathy group, and 15 patients with normal coronary angiography were assigned to the nonischemic cardiomyopathy group. Then, CGM parameters were studied and compared between the two groups. Results: Both ischemic and nonischemic cardiomyopathy groups were similar in age, LVEF, weight, height, and body mass index. Interestingly, there were no significant differences in the average value of the 40 CGM parameters that were analyzed in this study between the two study groups. Conclusions: When LBBB is the underlying rhythm, CGM cannot differentiate ischemic from nonischemic patients with good accuracy. Large studies, however, are needed to confirm our results.