Echocardiographic vs Invasive Measurement of the Direct Flow Transcatheter Aortic Heart Valve Mean Gradient: Contradictory or Complementary?

Vasileios F. Panoulas, Azeem Latib, Eustachio Agricola, Helmut Baumgartner, Ottavio Alfieri, Antonio Colombo

Research output: Contribution to journalArticle

Abstract

In this case report, we explain the reason behind observed differences in echocardiographic and invasively measured mean aortic valve gradient after transcatheter aortic valve implantation. A 25-mm Direct Flow valve (Direct Flow Medical Inc, Santa Rosa, CA) was successfully implanted in a patient with severe aortic stenosis via the transfemoral route. The discrepancy between invasive and echocardiographic measurements could be explained by the combination of a non-flat velocity profile inside the tubular structure of the Direct Flow valve, which can cause local low pressure fields that result in true high gradients detected using Doppler, and pressure recovery.

Original languageEnglish
JournalCanadian Journal of Cardiology
Volume31
Issue number10
DOIs
Publication statusPublished - Oct 1 2015

ASJC Scopus subject areas

  • Medicine(all)

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