Table 2.
Comparison of fast left atrial strain (ε) and strain rate (SR) measurements among subject groups
| Parameters | Normal Controls (n = 50) | HCM (n = 30) | HFpEF (n = 30) | HFmrEF (n = 30) | HFrEF (n = 40) |
|---|---|---|---|---|---|
| Left atrial longitudinal strain | |||||
| Reservoir εs, % | 35.3 ± 5.2 | 27.0 ± 4.8* | 23.8 ± 4.5*# | 18.8 ± 6.6*#$ | 12.0 ± 5.8*#$^ |
| Conduit εe, % | 18.1 ± 4.3 | 12.1 ± 4.3* | 9.6 ± 3.2*# | 8.6 ± 3.4*# | 6.1 ± 3.1*#$^ |
| Booster εa, % | 17.2 ± 3.5 | 14.9 ± 3.5* | 14.2 ± 3.7* | 10.2 ± 4.9*#$ | 6.0 ± 3.8*#$^ |
| Left atrial longitudinal strain rate | |||||
| Reservoir SRs, 1/s | 1.8 ± 0.4 | 1.3 ± 0.3* | 1.1 ± 0.2*# | 0.9 ± 0.3*#$ | 0.6 ± 0.2*#$^ |
| Conduit SRe, 1/s | −2.0 ± 0.5 | −1.1 ± 0.4* | −0.9 ± 0.3*# | −0.8 ± 0.3*# | −0.6 ± 0.3*#$^ |
| Booster SRa, 1/s | −2.3 ± 0.6 | −1.8 ± 0.4* | −1.7 ± 0.3* | −1.2 ± 0.5*#$ | − 0.7 ± 0.4*#$^ |
Data are represented as mean ± SD. HCM: hypertrophic cardiomyopathy, HFpEF heart failure with preserved ejection fraction, HFmrEF heart failure with mid-range ejection fraction, HFrEF heart failure with reduced ejection fraction, *significant difference compared to controls, #significant difference compared to HCM, $significant difference compared to HFpEF, ^significant difference compared to HFmrEF