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. Author manuscript; available in PMC: 2013 Dec 9.
Published in final edited form as: Heart. 2012 Feb;98(3):10.1136/heartjnl-2011-300737. doi: 10.1136/heartjnl-2011-300737

Figure 2.

Figure 2

Apical four chamber myocardial contrast echocardiography images and left coronary arteriography from a right anterior oblique projection at baseline and after intracoronary injection of acetylcholine (Ach) to test for endothelial function through nitric oxide mediated vasodilation. Acetylcholine resulted in a paradoxical vasoconstriction of the left anterior descending artery (arrows on arteriography), which could be detected non-invasively by a severe subendocardial perfusion defect in the distal anterior septum on myocardial contrast echocardiography (arrows).