Table 2.
Left Atrial Parameters Among Subjects Receiving Beta‐blockers and Subjects Not Receiving Beta‐blockers
| Left Atrial Parameters | Beta‐blocker Use | No Beta‐blocker Use | P Value |
|---|---|---|---|
| Reservoir function | |||
| Total longitudinal strain, % | 24±10 | 28±11 | 0.005 |
| LA expansion index | 1.10±0.41 | 1.35±0.43 | <0.001 |
| Conduit function | |||
| Positive longitudinal strain, % | 11±7 | 13±8 | 0.06 |
| Early‐diastolic strain rate, %/sa | −83±49 | −99±54 | 0.022 |
| Passive LA ejection fraction, % | 22±8 | 23±9 | 0.13 |
| Booster pump function | |||
| Negative longitudinal strain, %a | −13±6 | −15±6 | 0.008 |
| Late‐diastolic strain rate, %/sa | −140±62 | −163±66 | 0.008 |
| Active LA emptying fraction, % | 37±10 | 42±10 | 0.001 |
LA indicates left atrium.
a
Less negative value of diastolic strain and strain rate indicates worse LA function.