Doppler myocardial imaging assessment of left ventricular lateral wall and interventricular septum
| Variable | Controls (n = 25) | Users (n = 20) | Non-users (n = 25) | |||
|---|---|---|---|---|---|---|
| Am, myocardial atrial diastolic wave; CTm, myocardial contraction time; Em, myocardial early diastolic wave; PCTm, myocardial pre-contraction time; RTm, myocardial relaxation time; Sm, myocardial systolic peak velocity. | ||||||
| †p<0.001: non-users versus controls and users. | ||||||
| *P<0.001: users versus controls and non-users. | ||||||
| **P<0.01: users versus controls and non-users. | ||||||
| LV lateral wall | ||||||
| Sm peak (m/s) | 0.09 (0.04) | 0.10 (0.04) | 0.11 (0.03) | |||
| PCTm (ms) | 108.6 (13.4) | 100.6 (18.4) | 105.2 (19.7) | |||
| CTm (ms) | 253.8 (21.2) | 254.8 (37.2) | 268.7 (13.4) | |||
| Em peak (m/s) | 0.09 (0.02) | 0.07 (0.02) | 0.14 (0.04)† | |||
| Am peak (m/s) | 0.08 (0.02) | 0.11 (0.02) | 0.12 (0.02) | |||
| Em/Am ratio | 1.1 (0.4) | 0.9 (0.4)** | 1.3 (0.3) | |||
| RTm (ms) | 78.2 (21.2) | 77.2 (21.2) | 78.3 (12.2) | |||
| Interventricular septal wall | ||||||
| Sm peak (m/s) | 0.11 (0.02) | 0.11 (0.03) | 0.12 (0.02) | |||
| PCTm (ms) | 102.5 (13.1) | 101.5 (22.1) | 105.6 (18.2) | |||
| CTm (ms) | 269.2 (10.4) | 275.3 (15.4) | 278.4 (16.1) | |||
| Em peak (m/s) | 0.11 (0.3) | 0.09 (0.3) | 0.15 (0.05)† | |||
| Am peak (m/s) | 0.08 (0.02) | 0.10 (0.02) | 0.10 (0.02) | |||
| Em:Am ratio | 1.3 (0.7) | 0.9 (0.8)* | 1.6 (0.9) | |||
| RTm (ms) | 74.7 (15.1) | 75.7 (15.1) | 76.2 (13.1) | |||