Patient cohort
Following institutional review board approval (IRB), we identified all
patients with prior MVS (replacement or repair) who developed
ventricular arrhythmia (VA), defined as occurrence of VT or PVC who then
underwent radiofrequency CA for this between January 2013 and December
2018. A total of 31 patients with prior history of MVS who underwent
ablation for VT (16 patients) or PVC (15 patients) were identified.
Patients with congenital heart disease were excluded. The Mayo Clinic
comprehensive clinical record system was used to abstract data.