Diagnostic Challenges in Aortic Stenosis.

Addition of surgical treatment if severe concomitant MR was present to AV replacement improved survival in an unadjusted population but did not reach statistical significance after propensity matching.

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However, in patients with a smaller aortic caliber, PRF may be significant and, therefore, VMax and gradients may overestimate AS [ 13 , 14 ].

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