Table 3. Comparison of left atrial structure and function between the two groups.
| Variables | NOHCM group (n=58) | HC group (n=30) | t/Z value | P value |
|---|---|---|---|---|
| LAVmax (mL) | 68.13±17.54 | 53.58±12.63 | 4.030 | <0.001 |
| LAVmin (mL) | 34.66±13.11 | 20.87±6.77 | 5.388 | <0.001 |
| LAVpre-a (mL) | 52.42 (43.31, 65.10) | 35.21 (29.38, 40.78) | −4.890 | <0.001 |
| LAVI (mL/m2) | 36.27±9.38 | 29.20±6.21 | 3.720 | <0.001 |
| LATEF (%) | 50.21±9.43 | 61.28±7.51 | −5.570 | <0.001 |
| LAPEF (%) | 21.26±6.29 | 30.83±6.58 | −6.658 | <0.001 |
| LAAEF (%) | 37.07±8.87 | 44.06±8.71 | −3.527 | 0.001 |
| εs (%) | 26.88 (19.82, 35.19) | 41.12 (33.58, 53.56) | −5.145 | <0.001 |
| SRs (s−1) | 1.45 (0.94, 1.87) | 2.10 (1.69, 2.28) | −4.028 | <0.001 |
| εe (%) | 13.49 (8.44, 19.07) | 24.39 (17.71, 31.17) | −5.449 | <0.001 |
| SRe (s−1) | −1.11 (−1.82, −0.73) | −2.08 (−2.97, −1.70) | −5.199 | <0.001 |
| εa (%) | 13.68±4.23 | 16.72±3.55 | −3.371 | 0.001 |
| SRa (s−1) | −1.81 (−2.16, −1.08) | −2.11 (−2.34, −1.81) | −3.015 | 0.003 |
Data are presented as mean ± standard deviation or median (Q1, Q3). εa, active strain; εe, passive strain; εs, total strain; HC, healthy controls; LAVmax, left atrial maximum volume; LAVmin, left atrial minimum volume; LAVpre-a, left atrial volume before left ventricular systole; LAVI, left atrial volume index; LATEF, left atrial total ejection fraction; LAPEF, left atrial passive ejection fraction; LAAEF, left atrial active ejection fraction; NOHCM, nonobstructive hypertrophic cardiomyopathy; SRa, peak late negative strain rate; SRe, peak early negative strain rate; SRs, peak positive strain rate.