Table 4.
Comparison of LV and LA CMR strain parameters between the study groups.
| Control group (n= 20) | MVP group (n= 20) | P value | |
|---|---|---|---|
| LV strain parameters | |||
| GLS (%) | −18.6(−19.3,−16.1) | −15.4(−15.6,−14.2) | 0.001* |
| GCS (%) | −12.8(−14.6, −11.07) | −15.4(−19, −12.4) | < 0.001* |
| GRS (%) | < 0.001* | ||
| LA strain parameters | |||
| GLS (%) | −18 (−24, −15.6) | −15 (−16.9, −13.1) | 0.021* |
| GRS (%) | 48 (34, 66.4) | 26.9(23.2,36.8) | < 0.001* |
| LA ξs (reservoir) (%) | 21.2)14.4,22.4) | 14.4(10.5,17.7) | < 0.001* |
| LA ξe (conduit) (%) | 15.7 (11.5,21.6) | 11.2(2.6,13) | 0.002* |
| LA ξa (booster) (%) | 5.9(4,6.5) | 4.1 (2.4,4.7) | 0.015* |
| LA strain rate parameters | |||
| LA SRs (reservoir) (s−1) | 1.7(0.9,1.2) | 0.9(0.6,1) | 0.007* |
| LA SRe (conduit) (s−1) | −2.05(−2.6,−1.4) | −0.8(−0.8, −0.4) | 0.001* |
| LA SRa (booster) (s−1) | −1.4(−2.07,−0.72) | −1.1(−1.2, −0.6) | 0.042* |
Quantitative data are expressed as mean ± SD (Independent samples t-test). Quantitative data are expressed as median (IQR) (Mann-Whitney U-test). *: Statistically significant, LV: left ventricle, GLS: Global longitudinal strain, GCS: Global circumferential strain, GRS: global radial strain, LA: Left atrium, LA ξs: Left atrial longitudinal reservoir strain, LA ξe: Left atrial passive strain, LA ξa: Left atrial active strain, LA SRs: Left atrial longitudinal peak positive strain rate, LA SRe: Left atrial peak early negative strain rate, LA Sra: Left atrial peak late negative strain rate.