Comparison of patients with and without exertional dyspnoea
| Characteristic | With exertional dyspnoea (n=17) | Without exertional dyspnoea (n=39) | Mean difference (95% CI ) | p Value |
|---|---|---|---|---|
| Data are mean (SD) or mean and 95% confidence interval (CI). | ||||
| DT, deceleration time; E/A ratio, ratio of early peak flow velocity to atrial peak flow velocity; LVEF, left ventricular ejection fraction; mean NN, mean of all NN intervals (NN=normal to normal RR interval); rMSSD, root mean square of successive differences of NN intervals; SDANN, standard deviation of the average NN intervals computed over five minute segments; SDNN, standard deviation of all NN intervals; SDNN index, average of all standard deviations of NN intervals computed over five minute segments. | ||||
| Radionuclide ventriculography | ||||
| LVEF | 0.57 (0.8) | 0.58 (0.7) | 0.01 (−0.43 to 0.45) | NS |
| Echocardiography | ||||
| E/A ratio | 1.0 (0.3) | 1.2 (0.4) | 0.2 (0.01 to 0.39) | 0.005 |
| DT (ms) | 196 (52) | 164 (38) | −32 (−59.45 to −4.55) | 0.003 |
| Heart rate variability | ||||
| Heart rate (beats/min) | 85 (7) | 82 (8) | −3 (−7.17 to 1.17) | NS |
| SDNN (ms) | 117 (23) | 144 (38) | 27 (10.82 to 43.18) | 0.01 |
| SDANN (ms) | 108 (23) | 134 (37) | 26 (10.05 to 41.95) | 0.01 |
| SDNN index (ms) | 42 (10) | 52 (17) | 10 (2.85 to 17.15) | 0.02 |
| rMSSD (ms) | 20 (8) | 28 (12) | 8 (2.65 to 13.35) | 0.01 |