Author + information
- S. Cay,
- O. Ozeke,
- M. Kara,
- F. Ozcan,
- D. Aras and
- S. Topaloglu
The aim of the study was to investigate whether the P/PR segment in lead DII (Macruz index) and the P wave terminal segment in lead V1 (Morris index) were predictors of AFib recurrence in patients underwent paroxysmal AFib ablation using cryoballoon.
Overall 246 patients (123 male; the mean age, 55.8±11.2 years) were included. ECG recordings of all patients prior to the procedure were investigated.
All 941 PVs (38 left common, 9 right common, 4 right accessory) were successfully isolated. Temporary phrenic nerve palsy was observed in 6 patients. The mean follow-up duration was 21.0 ± 15.8 months. All patients received anti-arrhythmic treatment throughout the first three months. During follow-up, recurrence developed in 36 patients. The mean P wave duration was 104.6±15.0 msec and 102.2±12.8 msec in patients with and without recurrence, respectively (p=0.314). The mean Macruz index was 1.63±0.22 and 1.51±0.26 (p=0.014) and the mean Morris index was 0.036 ± 0.006 and 0.031 ± 0.005 (p <0.001) in patients with and without recurrence, respectively. In addition, in multivariable regression analysis, the only parameter was found to be significant predictor of recurrence was the Morris index (OR=1.094, 95% CI 1.063-1.125, p<0.001).
The Morris index can be an independent predictor of recurrence in patients underwent paroxysmal AFib ablation using cryoballoon.