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Table 3 MRI parameters between normal vs increased CTR and CTR correlation with cardiac MRI parameters

From: Limitations of cardiothoracic ratio derived from chest radiographs to predict real heart size: comparison with magnetic resonance imaging

MRI parameter

CTR ≤ 50 (N = 194)

CTR > 50 (N = 115)

CMR and CTR correlation

LVEDVi (ml/m2)

89 (76–106)

110 (86–139)

0.367 (p < 0.005)

LVEF (%)

54 (42.5–61)

42 (29–55)

− 0.341 (p < 0.005)

Indexed LV mass (mg/m2)

68 (60–78.5)

80 (66–98)

0.319 (p < 0.005)

RVEDVi (ml/m2)

75 (64–89)

84 (66–102)

0.170 (p < 0.005)

RVEF (%)

58 (53–63)

54 (41–59)

− 0.241 (p < 0.005)

Indexed LA volume (ml/m2)

40 (32–50)

56 (40–75)

0.389 (p < 0.005)

Indexed LA area (cm2/m2)

13 (10–15)

15 (12–18)

0.360 (p < 0.005)

Indexed RA volume (ml/m2)

33.5 (27–42.5)

40 (31–58)

0.247 (p < 0.005)

Indexed RA area (cm2/m2)

11 (9–12)

12 (10–15)

0.249 (p < 0.005)

  1. Values in the two middle columns are median (interquartile range), and values in the far-right column are correlation coefficients
  2. MRI magnetic resonance imaging, CTR cardiothoracic ratio, LVEDVi left ventricular indexed end-diastolic volume, LVEF left ventricular ejection fraction, LV left ventricle, RVEDVi right ventricular indexed end-diastolic volume, RVEF right ventricular ejection fraction, LA left atrium, RA right atrium