Matches in SemOpenAlex for { <https://semopenalex.org/work/W2026250962> ?p ?o ?g. }
Showing items 1 to 83 of
83
with 100 items per page.
- W2026250962 endingPage "203" @default.
- W2026250962 startingPage "200" @default.
- W2026250962 abstract "The frequency spectrum of the first heart sound (S1) was measured noninvasively in 54 patients with porcine bioprosthetic valves inserted in the mitral position. Phonocardiograms were recorded on magnetic tape on line with a signal processor with which the frequency spectrum and peak frequency of S1 were determined. In 19 patients with normal natural mitral valves, the apparent peak frequency within the range of measured frequencies of S1 was 46 +/- 2 Hz (mean +/- SEM). In 11 patients with porcine bioprosthetic valves implanted in the mitral position for less than or equal to 11/2 years, the apparent peak frequency of S1 was 43 +/- 3 Hz, which was not significantly different from S1 in patients with normal mitral valves. However, in 33 patients with porcine bioprosthetic valves in place 5-7 years, the apparent peak frequency of S1 was higher, 67 +/- 2 Hz (p < 0.001). In patients in whom the porcine bioprosthetic valve was implanted 5 years or longer, the frequency spectrum of S1 showed a greater proportion of sound energy at frequencies between 50-200 Hz compared with patients in whom the prosthetic valve was implanted 11/2 years or less. changes of the frequency of S1 in these patients may be a manifestation of stiffening of the valve as a result of early degenerative changes." @default.
- W2026250962 created "2016-06-24" @default.
- W2026250962 creator A5049312345 @default.
- W2026250962 creator A5062221457 @default.
- W2026250962 creator A5064682431 @default.
- W2026250962 creator A5085541150 @default.
- W2026250962 creator A5091291156 @default.
- W2026250962 date "1981-01-01" @default.
- W2026250962 modified "2023-10-06" @default.
- W2026250962 title "Frequency of the first heart sound in the assessment of stiffening of mitral bioprosthetic valves." @default.
- W2026250962 cites W1543715150 @default.
- W2026250962 cites W1982375049 @default.
- W2026250962 cites W1990836704 @default.
- W2026250962 cites W1993108823 @default.
- W2026250962 cites W2030085450 @default.
- W2026250962 cites W2034651946 @default.
- W2026250962 cites W2036489740 @default.
- W2026250962 cites W2068669505 @default.
- W2026250962 cites W2086251415 @default.
- W2026250962 cites W43364161 @default.
- W2026250962 cites W2101456680 @default.
- W2026250962 doi "https://doi.org/10.1161/01.cir.63.1.200" @default.
- W2026250962 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/7438394" @default.
- W2026250962 hasPublicationYear "1981" @default.
- W2026250962 type Work @default.
- W2026250962 sameAs 2026250962 @default.
- W2026250962 citedByCount "51" @default.
- W2026250962 countsByYear W20262509622012 @default.
- W2026250962 countsByYear W20262509622013 @default.
- W2026250962 countsByYear W20262509622015 @default.
- W2026250962 countsByYear W20262509622016 @default.
- W2026250962 countsByYear W20262509622018 @default.
- W2026250962 countsByYear W20262509622019 @default.
- W2026250962 countsByYear W20262509622021 @default.
- W2026250962 countsByYear W20262509622022 @default.
- W2026250962 countsByYear W20262509622023 @default.
- W2026250962 crossrefType "journal-article" @default.
- W2026250962 hasAuthorship W2026250962A5049312345 @default.
- W2026250962 hasAuthorship W2026250962A5062221457 @default.
- W2026250962 hasAuthorship W2026250962A5064682431 @default.
- W2026250962 hasAuthorship W2026250962A5085541150 @default.
- W2026250962 hasAuthorship W2026250962A5091291156 @default.
- W2026250962 hasBestOaLocation W20262509621 @default.
- W2026250962 hasConcept C105795698 @default.
- W2026250962 hasConcept C122381330 @default.
- W2026250962 hasConcept C126322002 @default.
- W2026250962 hasConcept C159693508 @default.
- W2026250962 hasConcept C164705383 @default.
- W2026250962 hasConcept C168110828 @default.
- W2026250962 hasConcept C2777543888 @default.
- W2026250962 hasConcept C33923547 @default.
- W2026250962 hasConcept C71924100 @default.
- W2026250962 hasConceptScore W2026250962C105795698 @default.
- W2026250962 hasConceptScore W2026250962C122381330 @default.
- W2026250962 hasConceptScore W2026250962C126322002 @default.
- W2026250962 hasConceptScore W2026250962C159693508 @default.
- W2026250962 hasConceptScore W2026250962C164705383 @default.
- W2026250962 hasConceptScore W2026250962C168110828 @default.
- W2026250962 hasConceptScore W2026250962C2777543888 @default.
- W2026250962 hasConceptScore W2026250962C33923547 @default.
- W2026250962 hasConceptScore W2026250962C71924100 @default.
- W2026250962 hasIssue "1" @default.
- W2026250962 hasLocation W20262509621 @default.
- W2026250962 hasLocation W20262509622 @default.
- W2026250962 hasOpenAccess W2026250962 @default.
- W2026250962 hasPrimaryLocation W20262509621 @default.
- W2026250962 hasRelatedWork W1973176983 @default.
- W2026250962 hasRelatedWork W2009215412 @default.
- W2026250962 hasRelatedWork W2016888359 @default.
- W2026250962 hasRelatedWork W2026250962 @default.
- W2026250962 hasRelatedWork W2035087909 @default.
- W2026250962 hasRelatedWork W2065604634 @default.
- W2026250962 hasRelatedWork W2078334426 @default.
- W2026250962 hasRelatedWork W2131694096 @default.
- W2026250962 hasRelatedWork W2416507477 @default.
- W2026250962 hasRelatedWork W2440898288 @default.
- W2026250962 hasVolume "63" @default.
- W2026250962 isParatext "false" @default.
- W2026250962 isRetracted "false" @default.
- W2026250962 magId "2026250962" @default.
- W2026250962 workType "article" @default.