Why the study?
Does Doppler echocardiography overestimate aortic valve mean gradients compared to catheterization following TAVI with balloon-expandable versus self-expanding prostheses?
Does Doppler echocardiography overestimate aortic valve mean gradients compared to catheterization following TAVI with balloon-expandable versus self-expanding prostheses?
Doppler echocardiography overestimates aortic valve mean gradients compared to catheterization after TAVI, particularly in balloon-expandable prostheses, likely due to pressure recovery and flow acceleration.
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Post-TAVI Doppler gradients may overestimate catheterization values, especially with balloon-expandable valves; leaves open need for validated assessment thresholds.
Following TAVI, aortic valve mean gradients acquired by Doppler were higher than catheterization and the discrepancy was more pronounced in balloon-expandable than self-expanding prostheses. These differences persist in skirted valves and across valve sizes. These observations may reflect periprocedural hemodynamic changes, differences between prosthetic flow acceleration, and/or pressure recovery.
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Biersmith et al. (2022) studied this question.
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