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Table 2 Secondary findings

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

  1. Results presented as mean values with 95% confidence intervals. A late trans mitral maximum flow velocity, a late diastolic maximal lateral mitral annular tissue velocity with atrial contraction, CPAP continuous positive airway pressure, E early trans mitral maximum flow velocity, e early diastolic maximal lateral mitral annular tissue velocity, HR heart rate, LA area left atrial area, LASct left atrial contraction strain, LV EDV left ventricular end-diastolic volume, LV GLS left ventricular global longitudinal strain, LV GLSR left ventricular global longitudinal strain rate, pLASRr peak left atrial reservoir strain rate, PLR passive leg raise, s maximal systolic lateral mitral annular tissue