Fig. 2From: Electrocardiographic and electrophysiological characteristics of idiopathic ventricular arrhythmias with acute successful ablation at the superior portion of the mitral annulusGraphical illustration of the SP-MA location in the nonstandard LAO view. Arrow 1 indicates the septal boundary of the SP-MA, which is the anatomic location of the AMC. Arrow 2 indicates the free wall boundary of the SP-MA. VAs originating from this location showed a monophasic R-wave and no S-wave in the inferior leads during VAsBack to article page