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Table 3 Baseline and post-exercise physiology

From: Cardiac MRI-based right-to-left ventricular blood pool T2 relaxation times ratio correlates with exercise capacity in patients with chronic heart failure

 

Dyspnoea (n = 19)

No dyspnoea (n = 51)

p-value

LVEDVi (ml/m2 ± SD)

121.4 ± 55.0

117.7 ± 41.7

0.765

LVESVi (ml/m2 ± SD)

84.6 ± 56.2

68.3 ± 58.2a

0.658b

LVMi (g/m2 ± SD)

74.5 ± 24.4

70.0 ± 26.6a

0.488b

LVCI (ml/min/m2 ± SD)

2.8 ± 1.3

3.1 ± 1.3

0.319

LVEF (% ± SD)

35.9 ± 20.0

39.0 ± 17.2

0.531

RVEDVi (ml/m2 ± SD)

91.7 ± 40.7

89.0 ± 31.5a

0.300b

RVESVi (ml/m2 ± SD)

66.9 ± 36.8

55.5 ± 26.2a

0.879b

RVCI (ml/min/m2 ± SD)

1.9 ± 1.0

2.2 ± 1.1

0.223

RVEF (% ± SD)

27.8 ± 13.0

33.3 ± 13.3

0.130

Native T1 (ms ± SD)

1310 ± 84

1272 ± 64

0.105

ECV (% ± SD)

33.3 ± 8.6

29.1 ± 5.1

0.064

Scar burden (% ± IQR)

8.8 ± 5.0

4.2 ± 8.3a

0.011

BNP (pg/ml)

1394 ± 3410a

403 ± 697a

0.225

RV/LV T2 ratio (± SD)

0.43 ± 0.11

0.54 ± 0.11

< 0.001

RRsys (pre; mmHg ± SD)

120.5 ± 20.9

122.4 ± 22.2

0.757

RRsys (post; mmHg ± SD)

137.1 ± 23.4

136.6 ± 22.9

0.931

HR (pre; 1/min ± SD)

79 ± 15

72 ± 14

0.075

HR (post; 1/min ± SD)

98 ± 18

93 ± 18

0.281

SpO2 (pre; % ± SD)

97 ± 2

97 ± 1

0.226

SpO2 (post; % ± SD)

97 ± 2

97 ± 2

0.799

Distance (m ± SD)

314 ± 134

466 ± 105

< 0.001

  1. Post-exercise dyspnoea was subjectively judged based on a modified Borg dyspnoea scale and values ≥ 4 (“somewhat severe”) were considered significant. Significant differences are highlighted in bold
  2. LV left ventricular, EDVi end-diastolic volume index, ESVi end-systolic volume index, CI cardiac output index, EF ejection fraction, LVMi left ventricular mass index, RV right ventriclular, ECV extracellular volume fraction, BNP brain natriuretic peptide, RRsys systolic blood pressure, HR heart rate, SpO2 peripheral capillary oxygen saturation
  3. aMedian ± interquartile range
  4. bDerived from Mann–Whitney U test
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Journal of Cardiovascular Magnetic Resonance

ISSN: 1532-429X

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