Matches in SemOpenAlex for { <https://semopenalex.org/work/W2016391904> ?p ?o ?g. }
Showing items 1 to 86 of
86
with 100 items per page.
- W2016391904 endingPage "149" @default.
- W2016391904 startingPage "140" @default.
- W2016391904 abstract "Experimental investigators exclude “valve closure” as a cause of the first heart sound and recognize “valve tension” only as a minor contributing factor. They accept the exclusive importance of left ventricular events in causing the first heart sound and attribute the vibrations of this sound to accelerations and decelerations of the left ventricular-aortic system plus the blood it contains. Recent studies demonstrate that the second component of the first heart sound coincides with the opening of the aortic valve and relate it to the dynamic changes resulting from this event. They show that the vibrations of this second component are larger and have a higher frequency in the outflow tract of the left ventricle in comparison with the main chamber. Other studies have compared the amplitude of the first sound recorded within the left ventricle with that recorded either on the skin or over intermediate layers. The conclusion is that an average loss of 30 db is present. However, this loss is greater for low frequency than for high frequency vibrations. Changes of the first sound are discussed. They occur in experimental or clinical conditions as a result of changes in the power or rapidity of contraction of the left ventricle. Usually a change in frequency is noted on auscultation as a change in intensity. Modification of the volume of blood (dilatation) or thickness of the wall (hypertrophy) can also modify the first heart sound." @default.
- W2016391904 created "2016-06-24" @default.
- W2016391904 creator A5014638570 @default.
- W2016391904 creator A5029191352 @default.
- W2016391904 creator A5032131706 @default.
- W2016391904 creator A5078642270 @default.
- W2016391904 date "1971-08-01" @default.
- W2016391904 modified "2023-09-24" @default.
- W2016391904 title "New studies on the first heart sound" @default.
- W2016391904 cites W1519403607 @default.
- W2016391904 cites W1973125234 @default.
- W2016391904 cites W1984724654 @default.
- W2016391904 cites W1993400189 @default.
- W2016391904 cites W1994817508 @default.
- W2016391904 cites W2008243965 @default.
- W2016391904 cites W2027423615 @default.
- W2016391904 cites W2033904592 @default.
- W2016391904 cites W2034651946 @default.
- W2016391904 cites W2036489740 @default.
- W2016391904 cites W2049291029 @default.
- W2016391904 cites W2072967964 @default.
- W2016391904 cites W2090338393 @default.
- W2016391904 cites W2098626053 @default.
- W2016391904 cites W2101374038 @default.
- W2016391904 cites W2133085379 @default.
- W2016391904 cites W2253398928 @default.
- W2016391904 cites W2292180172 @default.
- W2016391904 cites W2579200379 @default.
- W2016391904 cites W4250974386 @default.
- W2016391904 cites W2126873955 @default.
- W2016391904 doi "https://doi.org/10.1016/0002-9149(71)90362-6" @default.
- W2016391904 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/4254391" @default.
- W2016391904 hasPublicationYear "1971" @default.
- W2016391904 type Work @default.
- W2016391904 sameAs 2016391904 @default.
- W2016391904 citedByCount "34" @default.
- W2016391904 countsByYear W20163919042021 @default.
- W2016391904 crossrefType "journal-article" @default.
- W2016391904 hasAuthorship W2016391904A5014638570 @default.
- W2016391904 hasAuthorship W2016391904A5029191352 @default.
- W2016391904 hasAuthorship W2016391904A5032131706 @default.
- W2016391904 hasAuthorship W2016391904A5078642270 @default.
- W2016391904 hasConcept C121332964 @default.
- W2016391904 hasConcept C126322002 @default.
- W2016391904 hasConcept C164705383 @default.
- W2016391904 hasConcept C203718221 @default.
- W2016391904 hasConcept C24890656 @default.
- W2016391904 hasConcept C2777324038 @default.
- W2016391904 hasConcept C2777361368 @default.
- W2016391904 hasConcept C2778921608 @default.
- W2016391904 hasConcept C2779435589 @default.
- W2016391904 hasConcept C2780714102 @default.
- W2016391904 hasConcept C71924100 @default.
- W2016391904 hasConceptScore W2016391904C121332964 @default.
- W2016391904 hasConceptScore W2016391904C126322002 @default.
- W2016391904 hasConceptScore W2016391904C164705383 @default.
- W2016391904 hasConceptScore W2016391904C203718221 @default.
- W2016391904 hasConceptScore W2016391904C24890656 @default.
- W2016391904 hasConceptScore W2016391904C2777324038 @default.
- W2016391904 hasConceptScore W2016391904C2777361368 @default.
- W2016391904 hasConceptScore W2016391904C2778921608 @default.
- W2016391904 hasConceptScore W2016391904C2779435589 @default.
- W2016391904 hasConceptScore W2016391904C2780714102 @default.
- W2016391904 hasConceptScore W2016391904C71924100 @default.
- W2016391904 hasIssue "2" @default.
- W2016391904 hasLocation W20163919041 @default.
- W2016391904 hasLocation W20163919042 @default.
- W2016391904 hasOpenAccess W2016391904 @default.
- W2016391904 hasPrimaryLocation W20163919041 @default.
- W2016391904 hasRelatedWork W1976615527 @default.
- W2016391904 hasRelatedWork W2016391904 @default.
- W2016391904 hasRelatedWork W2086380073 @default.
- W2016391904 hasRelatedWork W2112763008 @default.
- W2016391904 hasRelatedWork W2155435301 @default.
- W2016391904 hasRelatedWork W2164092263 @default.
- W2016391904 hasRelatedWork W2347969360 @default.
- W2016391904 hasRelatedWork W2415438441 @default.
- W2016391904 hasRelatedWork W2423609102 @default.
- W2016391904 hasRelatedWork W2532342598 @default.
- W2016391904 hasVolume "28" @default.
- W2016391904 isParatext "false" @default.
- W2016391904 isRetracted "false" @default.
- W2016391904 magId "2016391904" @default.
- W2016391904 workType "article" @default.