Effects of Verapamil and Metoprolol on heart rate variability in patients with coronary heart disease / 北京大学学报(医学版)

0.05). And HRV indexes of low-frequency(LF), high-frequency (HF) and total power (TP) were increased obviously, while the low-to high-frequency ratio (LF/HF), very-low-frequency (VLF) were remarkably lower(P