Table 2.
Changes in cardiac mechanics on speckle-tracking echocardiography in the rapid RV rapid pacing model of heart failure
| Speckle-Tracking Echocardiographic Parameter* | n | Normal | Heart Failure | P Value† |
|---|---|---|---|---|
| LV longitudinal systolic strain, % | 12 | 13.6 ± 2.2 | 6.3 ± 2.2 | <0.0001 |
| LV early diastolic strain rate, 1/s | 12 | 1.50 ± 0.49 | 0.83 ± 0.26 | 0.0006 |
| LA conduit strain, % | 12 | 10.1 ± 3.7 | 4.4 ± 2.7 | 0.001 |
| LA booster strain, % | 12 | 7.4 ± 3.4 | 4.2 ± 2.2 | 0.020 |
| LA reservoir strain, % | 12 | 17.5 ± 2.8 | 8.7 ± 3.2 | 0.0001 |
Values represent means ± SD. RV, right ventricular; LV, left ventricular; LA, left atrial. *All strain values are presented as absolute values. †Paired t test.