The post-procedural 3-month follow-up heart rate variability in the CPVI + SVC-L group showed a significantly greater reduction in the rMSSD ( 25.2 13.7 vs. 13.7 8.5 ms , P < 0.001 ) , HF ( 10.2 7.1 vs. 5.5 5.8 ms ( 2 ) , P < 0.001 ) , and LF/HF ( 1.6 0.5 vs. 0.9 0.3 , P < 0.001 ) than in the CPVI group .