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Figure 1 Contrast-enhanced short-axis images before (A) and after percutaneous transluminal septal myocardial ablation (PTSMA) (B) in a patient with hypertrophic obstructive cardiomyopathy. Before PTSMA, a slightly enhanced myocardial region is apparent in the anterobasal wall of the interventricular septum. After PTSMA, the ethanol-induced infarction can be seen as a clearly demarcated area of hyperenhancement.