A novel approach to determine aortic valve area with phase-contrast cardiovascular magnetic resonance

Table 3 Correlation values and intermethodical biases

	Pearson’s r	p-value	Bias	LLoA	ULoA	p-value
Stroke volume
vs. cine-CMR
PC-CMR	0.730	< 0.001	0.7 ml	− 41 ml	44 ml	0.829
TTE	0.504	< 0.001	16 ml	− 24 ml	55 ml	< 0.001
vs. Invasive measurement (Fick)
PC-CMR	0.697	< 0.001	30.4 ml	− 17 ml	76 ml	< 0.001
TTE	0.478	0.001	13 ml	− 22 ml	49 ml	< 0.001
vs. Invasive measurement (thermodilution)
PC-CMR	0.525	0.037	9 ml	− 47 ml	70 ml	0.159
TTE	0.484	0.057	6 ml	− 43 ml	56 ml	0.322
Mean pressure gradient
vs. Invasive measurement
PC-CMR	0.358	0.011	19 mmHg	− 16 mmHg	54 mmHg	< 0.001
TTE	0.755	< 0.001	3 mmHg	− 21 mmHg	28 mmHg	< 0.001
Peak pressure gradient
vs. Invasive measurement
PC-CMR	0.328	0.020	17 mmHg	− 46 mmHg	80 mmHg	< 0.001
TTE	0.719	< 0.001	10 mmHg	− 26 mmHg	49 mmHg	< 0.001
vs. TTE
PC-CMR	0.376	0.007	− 5 mmHg	− 54 mmHg	65 mmHg	0.249
Aortic valve area
vs. Invasive measurement (Fick)
PC-CMR	0.544	< 0.001	0.08 cm²	− 0.36 cm²	0.54 cm²	0.017
TTE	0.580	< 0.001	0.11 cm²	− 0.30 cm²	0.52 cm²	< 0.001
vs. TTE
PC-CMR	0.366	0.009	0.03 cm²	− 0.50 cm²	0.56 cm²	0.414
vs. Invasive measurement (thermodilution)
PC-CMR	0.773	0.001	0.05 cm²	− 0.35 cm²	0.44 cm²	0.409
TTE	0.557	0.039	0.05 cm²	− 0.46 cm²	0.56 cm²	0.459
Invasive (Fick)	0.720	0.004	0.15 cm²	− 0.28 cm²	0.57 cm²	0.024

CMR cardiovascular magnetic resonance imaging, LLoA lower limit of agreement, PC-CMR phase-contrast-CMR, TTE transthoracic echocardiography, ULoA upper limit of agreement

ISSN: 1532-429X