A New Method for Evaluation of Cavitation Near Mechanical Heart Valves

Peter Johansen, Keefe B. Manning, John M. Tarbell, Arnold A. Fontaine, Steven Deutsch, Hans Nygaard

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Evaluation of cavitation in vivo is often based on recordings of high-pass filtered random high-frequency pressure fluctuations. We hypothesized that cavitation signal components are more appropriately assessed by a new method for extraction of random signal components of the pressure signals. We investigated three different valve types and found a high correlation between the two methods (r2:0.8806-0.9887). The new method showed that the cavitation signal could be extracted without a priori knowledge needed for setting the high-pass filter cut off frequency, nor did it introduce bandwidth limitation of the cavitation signal.

Original languageEnglish (US)
Pages (from-to)663-670
Number of pages8
JournalJournal of Biomechanical Engineering
Volume125
Issue number5
DOIs
StatePublished - Oct 2003

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Physiology (medical)

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