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Figure 2 | BMC Cardiovascular Disorders

Figure 2

From: A new method of building permanent A-V block model: ablating his-bundle potential through femoral artery with pre-implanted biventricular pacemaker

Figure 2

Electrocardiographs and electrophysiological findings during the proceduces. A. Electrocardiograph before operation (in lead III, paper speed was 50 mm/sec); B. Obvious His-bundle potential at the site of left ventricular upper septum under aortic sinus (paper speed was 150 mm/sec); C. His-bundle potential in the right ventricle was much smaller than that in the left ventricle (paper speed was 150 mm/sec); D. His-bundle potential in non-coronary sinus (paper speed was 150 mm/sec); E. Ventricular fibrillation occurred when ablating his-bundle potential at Koch triangles (inlead III, paper speed was 10 mm/sec); F. Right ventricular pacing after ablating his-bundle(leadIII, VVI/60 bpm, paper speed was 50 mm/sec); G. Biventricular pacing after operation(lead III, VVI/130 bpm, paper speed was 50 mm/sec).

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