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Figure 3 | Journal of Cardiothoracic Surgery

Figure 3

From: Determination of mitral valve area with echocardiography, using intra-operative 3-dimensional versus intra- & post-operative pressure half-time technique in mitral valve repair surgery

Figure 3

Bland-Altman analysis and linear regression analysis between intra-operative mitral valve area measurement by 3-dimensional planimetry technique and pressure half-time technique. (A) Analysis using recorded transoeosophageal echocardiographic data, Top: Bland-Altman plot, bias and precision = 0.40 ± 0.43 cm2, Bottom: linear regression analysis, r = 0.81 (y = − 0.04 + 0.88 · x, p < 0.001), (B) Analysis by observer A using intra-operative transoeosophageal echocardiographic data, Top: Bland-Altman plot, bias and precision = 0.46 ± 0.57 cm2, Bottom: linear regression analysis, r = 0.62 (y = 0.56 + 0.66 · x, p <0.001), (C) Analysis by observer B using intra-operative transoeosophageal echocardiographic data, Top: Bland-Altman plot, bias and precision = 0.35 ± 0.68 cm2, Bottom: linear regression analysis, r = 0.74 (y = 0.17 + 0.83 · x, p <0.001).

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