Fig. 3
From: Bedside myocardial perfusion assessment with contrast echocardiography
Myocardial contrast perfusion echocardiography (MCPE) quantitative assessment. Regions of interest (ROI) are defined and rate of change in signal intensity assessed at end‐diastolic frames. The plateau signal intensity (A) is considered to represent the myocardial capillary blood volume. The rate of replenishment (β) of the microbubbles is considered as the velocity of blood. The product of A × β is considered to represent the myocardial blood flow