Figure 2From: Non-invasive evaluation of myocardial reperfusion by transthoracic Doppler echocardiography and single-photon emission computed tomography in patients with anterior acute myocardial infarction An example of impaired CFR. Coronary flow by spectral Doppler at rest (A) and during hyperaemia (B). CFR < 1.5, estimated in the patient with absence of myocardial viability and with extensive myocardial perfusion defect.Back to article page