Fig. 8
From: Contrast echocardiography: a practical guideline from the British Society of Echocardiography
a Steady state of myocardial perfusion at peak stress with a heart rate of 120 beats per minute. b Microbubbles are cleared with a high MI flash. c Delayed appearance of contrast with a reduced intensity in the sub endocardium seen in the apical segment after 4 cardiac cycles (see Additional file 2: Video S2)