Left ventricular high frame rate echo-particle image velocimetry: clinical application and comparison with conventional imaging

Table 2 linear correlations and differences according to Bland–Altman analysis between echoPIV and peak PW Doppler velocities, and respectively peak of the mean tracing of PW Doppler velocities

echoPIV versus PW Doppler maximal velocity	Linear correlation				Bland-Altmann
echoPIV versus PW Doppler maximal velocity	EchoPIV	PW Doppler	R²	P for correlation	Bias	LOA
Inflow [m/s]	0.70 ± 0.27	0.84 ± 0.29	0.77	< 0.001	0.19 (27%)	-0.08 to 0.46
Outflow [m/s]	0.61 ± 0.22	0.85 ± 0.21	0.54	0.003	0.28 (45%)	-0.03 to 0.59
echoPIV versus PW Doppler mean velocity	EchoPIV	PW Doppler	R²	P for correlation	Bias	LOA
Inflow [m/s]	0.7 ± 0.27	0.77 ± 0.26	0.80	< 0.001	0.12 (17%)	-0.11 to 0.35
Outflow [m/s]	0.61 ± 0.22	0.79 ± 0.21	0.44	0.009	0.22 (36%)	-0.11 to 0.55

HFR echoPIV also detected intracavitary jets that were not directly visible on the corresponding apical long axis colour Doppler classical echocardiography. Furthermore, those functional phenomena could be related to anatomical abnormalities seen in the associated CCT/CMR images

ISSN: 1476-7120