Significance of the Distal to Proximal Coronary Flow Velocity Ratio by Transthoracic Doppler Echocardiography for Diagnosis of Proximal Left Coronary Artery Stenosis

Measurement of the DAPAR by transthoracic Doppler echocardiography is a promising method in the noninvasive diagnosis of stenosis in the proximal left coronary artery lesion.