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Fig. 1 | Critical Care

Fig. 1

From: Bedside myocardial perfusion assessment with contrast echocardiography

Fig. 1

Normal myocardial contrast perfusion echocardiograph: qualitative assessment. Ultrasound contrast infused until steady state achieved (SS – steady state). A ‘flash’ of high mechanical index ultrasound destroys the contrast microbubbles within the imaging beam. Assessment of myocardial perfusion is then made as the microbubbles return to the myocardium over subsequent cardiac cycles (1–6). Normal replenishment occurs over 5–6 cardiac cycles at rest, 2–3 cardiac cycles with stress

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