Successful catheter ablation for sustained ventricular tachycardia in right ventricular infarction after surgery for giant right coronary artery aneurysm: a case report

Figure 1. (A) Three-dimensional computed tomography shows the giant right coronary artery aneurysm which gives off the conus branch and right ventricular branch. (B) Three-dimensional computed tomography shows the right coronary artery synthetic graft interposition for giant right coronary artery aneurysm. AP, anterior-posterior.

Figure 2. Twelve-lead electrocardiogram during ventricular tachycardia at 132 b.p.m with left bundle branch block morphology and inferior axis deviation. Electrocardiogram was recorded at a paper speed of 25 mm/s with an amplitude of 10 mm/mV.

Figure 3. (A) Activation mapping during VT shows the focal propagation from the anterior attachment of the right ventricular wall. Mid-diastolic potentials are obtained in close to the anterior attachment (tag). (B) Cardiac tracing of mid-diastolic potentials during the ventricular tachycardia is shown (arrow). MDPs, mid-diastolic potentials; VT, ventricular tachycardia.

Figure 4. (A) Entrainment at the mid-diastolic potentials recording site shows concealed fusion. (B) The stimulus-QRS interval is nearly equal to the local electrogram-QRS interval. MDPs, mid-diastolic potentials.

Figure 5. (A) Voltage mapping during SR. Delayed potentials are located within the dense scar area in the right ventricular free wall (tag). (B) Cardiac tracing of delayed potentials during the sinus rhythm is shown (arrow). (C) Three-dimensional computed tomography merged with the voltage mapping during SR. AP, anterior-posterior; DPs, delayed potentials; SR, sinus rhythm.