HRV at baseline (b) and in folow-up(f) after salbutamol(S) inhalation alone and in combination with ivabradine(I)in patients with COPD and CHD
| S b | S f | SI b | SI f | |
| HR,/min | 80.2±3.1 | 83.1±3.1 | 77.2±2.1 | 74.1±2.6∗ |
| SDNN,ms | 21.3±2.6 | 18.4±2.1∗ | 22.7±2.4 | 19.3±1.5 |
| LF,n.u. | 55.3±4.4 | 56.3±5.0 | 55.7±4.5 | 46.7±4.3∗ |
| HF,n.u. | 44.7±4.4 | 43.7±5.0 | 44.4±4.5 | 53.3±4.3∗ |
| LF/HF | 2.04±0.43 | 2.51±0.67 | 2.02±0.41 | 1.16±0.17∗ |
∗-p<0.05, baseline vs. follow-up