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Tracing from the electrophysiology study showing ventricular tachycardia intracardiac electrogram during ventricular tachycardia.
Notes: I, II and V1 were surface electrocardiography leads. HRA and ABL are intracardiac leads (HRA is the diagnostic catheter and placed in high right atrium, ABL is the ablation catheter and placed in the left ventricle).
Abbreviations: HRA, high right atrium; ABL, ablation catheter; A, atrium; V, ventricle; d, distal; p, proximal.
