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Figure 2 | Cardiovascular Ultrasound

Figure 2

From: Coronary artery occlusions diagnosed by transthoracic Doppler

Figure 2

Examples of anterograde and retrograde flow in marginal branches of the left circumflex coronary artery. In modified apical four chamber views, a marginal branch of the left circumflex coronary artery (CxMb) is imaged by colour Doppler mapping with matching spectral Doppler tracings of blood flow: (A,B) The CxMb is seen with anterograde flow. (C,D) The CxMb is seen with retrograde flow. Ao = aortic valve and ascending aorta, D = spectral Doppler tracings of diastolic coronary blood flow, IS = interventricular septum, LA = left atrium, LV = left ventricle, MR = mitral ring, RA = right atrium, RV = right ventricle, S = spectral Doppler tracings of systolic coronary blood flow.

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