Right ventricular resynchronization in a patient with repaired tetralogy of Fallot and severe ventricular dysfunction

Right ventricular (RV) resynchronization therapy (CRT) with stimulation electrode implantation in the latest activation area guided by a high-density electroanatomic activation map was successfully performed in a patient with repaired tetralogy of Fallot (rToF), severe pulmonary regurgitation (PR), and severe dysfunction and dilatation of the right ventricle. An improvement in his clinical condition and intraventricular synchrony was achieved. There is a mechanical-electrical interaction in the right ventricle of patients with rToF; therefore, RV CRT in selected cases may be beneficial. Electroanatomic activation mapping can help achieve maximum clinical benefit by identifying the optimal stimulation site.

Automated summary

Right ventricular resynchronization therapy guided by high-density electroanatomic activation mapping can improve clinical condition and intraventricular synchrony in patients with repaired tetralogy of Fallot and right ventricular dysfunction. Identifying the optimal stimulation site through electroanatomic activation mapping is crucial for achieving maximum clinical benefit.