Differential Diagnosis in Cases Showing Poor R-Wave Progression on EKG by Vectorcardiography

ABSTRACT

The vectorcardiography was performed on 34 cases with PRWP of precordial leads. We have studied the vectorcardiographic finding for the differential diagnosis of disease entities were obtrained; 1) Poor R-Wave progression of precordial leads has simply considered as suggestion of anterior myocardial infarction, ischemic heart disease, chronic lung disease and normal variant. 2) The sensitivity and specificity of myocardial infarction criteria were 85.8% and 63.0% respectively in left sagittal plane and 85.8% and 66.7% respectively in horizontal plane. 3) The seneitively and specificity of more than 90 QRS-T vector angle in left sagittal plane were 100.0% and 62.5% respectively in ischemic heart disease and myocardial infarction. 4) The sensitively and specificity of chronic lung disease criteria were 85.7% and 51.9% respectively. 5) Vectorcardiographic study was considered as effective differentiating method for patients with PRWP in EKG.