Key result
MDCT aortic valve planimetry 50-100 ms after the R peak maximizes opening area and image quality.
Why the study?
Measurements of the aortic valve opening area with MDCT vary with the cardiac cycle, and the optimal timing for measurement was unclear.
What is the optimal cardiac phase for measuring the aortic opening area using MDCT?
Population
57 patients undergoing retrospectively gated MDCT
Comparison
Aortic valve planimetry at 0, 50, 100, 150, and 200 milliseconds after the R wave peak
Design
Observational study with retrospectively gated MDCT
Authors
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Target midsystolic phases (50-100 ms post-R) for MDCT aortic valve planimetry; leaves open prospective validation versus echocardiography.
Observational (n=57)
What is the optimal cardiac phase for measuring the aortic opening area using MDCT?
Aortic valve planimetry using MDCT is optimized when performed at 50-100 milliseconds after the R peak, yielding the widest opening area and best image quality with the fewest artifacts.
Abbara et al. (2007) conducted an observational in Aortic valve assessment (n=57). MDCT at 50-100 milliseconds after R wave peak vs. MDCT at 0, 150, or 200 milliseconds after R wave peak was evaluated on Aortic opening area and presence of artifacts. Aortic valve planimetry using MDCT is optimally performed at 50-100 milliseconds after the R peak, where the aortic opening area is widest (2.9 cm2) and image quality is best.
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