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Figure 4 CMR Image After Septal Ablation With Residual Obstruction

Long-axis cardiovascular magnetic resonance (CMR) image views after alcohol septal ablation on a post-gadolinium study. There is sparing of the proximal basal septum (white arrow). The region of the hyperenhancement involves mainly the right ventricular side of the ventricular septum (black arrows). This patient had the most proximal septal perforator cannulated with apparent localization to the basal septum on contrast echocardiography during the ablation procedure. LA = left atrium; LV = left ventricle.