Key result
Shortening the echo time to 1.5 ms in phase contrast cardiovascular magnetic resonance improved the agreement of aortic valve area estimates with Doppler echocardiography (bias 0.00 ± 0.39 cm2).
Why the study?
Does reducing echo time in phase contrast CMR improve the agreement of aortic valve area calculations with Doppler echocardiography in patients with moderate to severe aortic stenosis?
Population
15 patients with isolated moderate or severe aortic stenosis, mean age 71 ± 10.5 years, 11 men. Excluded…
Comparison
Phase contrast cardiovascular magnetic resonance… vs Phase contrast CMR with standard echo time and…
Design
Cross-sectional, Analysis was performed off-line by a single experienced…
Authors
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Shorter echo times may improve phase contrast CMR agreement with echocardiography in aortic stenosis; leaves open whether this affects outcomes or supplants planimetry.
Cross-Sectional (n=15)
Single-blind
No
Does reducing echo time in phase contrast CMR improve the agreement of aortic valve area calculations with Doppler echocardiography in patients with moderate to severe aortic stenosis?
Absolute Event Rate: 0% vs 0.11%
Reducing echo time to 1.5 ms in phase contrast CMR improves the accuracy of aortic valve area calculations in aortic stenosis, though direct planimetry remains the most accurate CMR method compared to echocardiography.
O’Brien et al. (2009) conducted a cross-sectional in Moderate or severe aortic stenosis (n=15). Phase contrast cardiovascular magnetic resonance vs. Echo time (TE) 2.8 ms and Doppler echocardiography was evaluated on Agreement of CMR aortic valve area with echocardiography (bias). Shortening the echo time to 1.5 ms in phase contrast cardiovascular magnetic resonance improved the agreement of aortic valve area estimates with Doppler echocardiography (bias 0.00 ± 0.39 cm2).
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