Table 2.
Left atrial size and function
| Variable | TTS (n = 124) | Anterior STEMI (n = 125) | p |
|---|---|---|---|
| LA area 2-chamber view (cm2) | |||
| Ventricular end-systole | 21 (18–24) | 22 (19–25) | 0.03 |
| Ventricular end-diastole | 14 (12–19) | 14 (12–18) | 0.78 |
| LA area 4-chamber view (cm2) | |||
| Ventricular end-systole | 23 (20–28) | 23 (20–27) | 0.90 |
| Ventricular end-diastole | 16 (12–20) | 15 (12–19) | 0.26 |
| LA volume biplane (ml) | |||
| Ventricular end-systole | 72 (55–93) | 74 (61–93) | 0.36 |
| Immediately before atrial contractiona | 56 (39–70) | 55 (46–68) | 0.71 |
| Ventricular end-diastole | 38 (25–58) | 38 (30–49) | 0.67 |
| LA function (%) | |||
| Total EF (global function; reservoir) | 44 (34–53) | 51 (42–56) | <0.01 |
| Passive EF (conduit)a | 21 (14–30) | 24 (20–29) | 0.03 |
| Active EF (booster pump)a | 29 (20–38) | 35 (28–42) | <0.01 |
Values are median (IQR)
EF emptying fraction, LA left atrial, TTS Takotsubo syndrome, STEMI ST-segment elevation myocardial infarction
aPatients with atrial fibrillation during CMR imaging (n = 8 in the TTS group and n = 10 in the STEMI group) were excluded from this analysis
P-values in bold type indicate a significant difference between groups