ABSTRACT
Coronary angiography, obtained either invasively or more recently non-invasively, shows the anatomic printout of the coronary arteries, but provides little information on the function of the arterial conduit, which is an important parameter for clinical decision-making, particularly in intermediate coronary lesions. Transthoracic coronary Doppler ultrasound is a recently developed extension of echocardiography,1-9 which allows direct measurement of coronary flow velocity at the patient’s bedside, thus providing non-invasively the functional information missed at coronary angiography.
