Mitral Doppler echocardiography
| Variable | Controls | Ischaemic | Idiopathic |
|---|---|---|---|
| E wave velocity (m/s) | 0.6 (0.2) | 0.8 (0.5) | 0.5 (0.4) |
| E wave deceleration time (ms) | 200 (40) | 180 (80) | 140 (35) |
| A wave velocity (m/s) | 0.5 (0.1) | 0.3 (0.3) | 0.8 (0.2)* †† † |
| E/(E+A) ratio | 0.6 (0.1) | 0.7 (0.4) | 0.4 (0.2)†† |
| A2–onset of flow (ms) | 95 (10) | 90 (30) | 120 (20)* †† |
| A2–peak of E wave (ms) | 175 (20) | 155 (40) | 200 (45) |
| Duration of flow (ms) | 545 (130) | 340 (200)3-165 | 345 (145)** |
| Duration of regurgitation (ms) | 400 (15) | 425 (50) | 445 (30) |
Values are mean (SD). A2, first high frequency component of the second heart sound on the phonocardiogram; A2–onset of flow, the Doppler isovolumic relaxation time measured as the interval between A2 and the onset of flow across the mitral valve; A velocity, peak velocity of the atrial component of mitral filling; E velocity, peak velocity of the early component of mitral filling; E/(E+A), ratio of peak early filling velocity to the sum of the peak early and the peak atrial filling velocities.
↵3-165 p<0.001, **p<0.01, *p<0.05 v controls;†† †p<0.001, ††p<0.01 v ischaemic group.