From: Left atrial contraction strain and controlled preload alterations, a study in healthy individuals
CPAP | Pre CPAP | CPAP | P value |
LASr (%) | 40.7 (38.3 to 43.1) | 35.4 ± 33.1–37.6 | < 0.001 |
pLASRr (s− 1) | 1.8 (1.6 to 1.9) | 1.5 (1.4 to 1.7) | 0.018 |
LA Area (cm− 2) | 16.0 (14.2 to 17.7) | 14.1 (12.5 to 15.7) | 0.026 |
LV GLS (%) | − 19.5 (− 20.4 to − 18.6) | − 18.2 (− 19.2 to − 17.1) | < 0.001 |
LV GLSR (s− 1) | − 1.0 (− 1.1 to − 0.9) | − 1.0 (− 1.1 to − 1.0) | 0.319 |
LVOT VTI (cm) | 23.8 (21.9 to 25.8) | 18.4 (16.4 to 20.4) | < 0.001 |
E (m/s) | 0.85 (0.80 to 0.91) | 0.70 (0.66 to 0.74) | < 0.001 |
A (m/s) | 0.43 (0.39 to 0.47) | 0.40 (0.35 to 0.44) | 0.085 |
e (m/s) | 0.14 (0.13 to 0.15) | 0,11 (0.10 to 0.13) | < 0.001 |
a (m/s) | 0.057 (0.051 to 0.063) | 0.051 (0.047 to 0.056) | 0.009 |
s (m/s) | 0.092 (0.083 to 0.10) | 0.085 (0.076 to 0.094) | 0.028 |
HR (min− 1) | 60.3 (56.9 to 63.7) | 57.0 (53.6 to 60.5) | 0.055 |
LV EDV (ml) | 107.0 (97.5 to 116.5) | 90.6 (80.0 to 101.2) | 0.002 |
PLR | Pre PLR | PLR | P value |
LASr (%) | 37.4 (35.8 to 39.1) | 41.5 (39.4 to 43.6) | 0.001 |
pLASRr (s− 1) | 1.48 (1.38 to 1.59) | 1.69 (1.57 to 1.81) | 0.013 |
LA Area (cm2) | 14.9 (13.4 to 16.4) | 16.4 (15.2 to 17.6) | 0.007 |
LV GLS % | − 17.1 (− 17.8 to − 16.4) | −17.8 (− 18.8 to 16.8) | 0.129 |
LV GLSR (s− 1) | − 0.98 (− 1.03 to − 0.94) | −0.96 (− 1.02 to − 0.89) | 0.346 |
LVOT VTI (cm) | 21.1 (19.7 to 22.5) | 22.6 (21.4 to 23.7) | < 0.001 |
E (m) | 0.79 (0.74 to 0.84) | 0.79 (0.74 to 0.84) | 0.907 |
A (m) | 0.39 (0.36 to 0.41) | 0.39 (0.35 to 0.42) | 0.777 |
e (m) | 0.14 (0.13 to 0.15) | 0.15 (0.14 to 0.16) | 0.124 |
a (m) | 0.053 (0.048 to 0.058) | 0.058 (0.053 to 0.063) | 0.020 |
s (m) | 0.089 (0.082 to 0.10) | 0.094 (0.088 to 0.10) | 0.046 |
HR (min−1) | 59.3 (55.9 to 62.7) | 59.3 (55.6 to 63.1) | 0.962 |
LV EDV (ml) | 103.8 (93.4 to 114.3) | 106.3 (95.9 to 116.8) | 0.384 |