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Table 2 Interobserver and intraobserver variability for measurements of transesophageal echocardiographic data

From: Glucose-insulin-potassium improves left ventricular performances after aortic valve replacement: a secondary analysis of a randomized controlled trial

Measurements

Interobserver

Correlation

Coefficient

95% Confidence Interval

Intraobserver

Correlation

Coefficient

95% Confidence Interval

Vp

0.742

0.488–0.945

0.791

0.477–0.944

FAC

0.956

0.890–0.983

0.883

0.723–0.953

2D-LVEF

0.890

0.739–0.956

0.923

0.812–0.970

3D-LVEF

0.819

0.591–0.926

0.840

0.595–0.973

PGLS

0.856

0.571–0.908

0.899

0.671–0.943

  1. Vp, transmitral flow propagation velocity; FAC, fractional area change; 2D-LVEF-, two-dimensional left ventricular ejection fraction; 3D-LVEF-, three-dimensional left ventricular ejection fraction; PGLS, peak global longitudinal strain