S3 Heart Sound Topic Review | Learn the Heart - Healio
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The third heart sound (S3), also known as the “ventricular gallop,” occurs just after S2 when the mitral valve opens, allowing passive filling of the left ... BacktoHealio ECGInterpretation QuizzesandCases CardiologyReview LearnTheHeart CardiologyReview TopicReviewsA-Z TopicReviewsA-Z Save S3HeartSoundTopicReview Thethirdheartsound(S3),alsoknownasthe“ventriculargallop,”occursjustafterS2whenthemitralvalveopens,allowingpassivefillingoftheleftventricle. TheS3soundisactuallyproducedbythelargeamountofbloodstrikingaverycompliantleftventricle. CLINICALPEARL:AS3heartsoundisproducedduringpassiveleftventricularfillingwhenbloodstrikesacompliantLV. Enlarge IftheLVisnotoverlycompliant,asisinmostadults,aS3willnotbeloudenoughtobeauscultated.AS3canbeanormalfindinginchildren,pregnantfemalesandwell-trainedathletes;however,aS4heartsoundisalmostalwaysabnormal. CLINICALPEARL:AS3heartsoundisoftenasignofsystolicheartfailure,howeveritmaysometimesbeanormalfinding. AS3canbeanimportantsignofsystolicheartfailurebecause,inthissetting,themyocardiumisusuallyoverlycompliant,resultinginadilatedLV;thiscanbeseenintheimagebelow. Enlarge NormalLVvs.DilatedLV(S3Present) S3isalow-pitchedsound;thisishelpfulindistinguishingaS3fromasplitS2,whichishighpitched.AS3heartsoundshoulddisappearwhenthediaphragmofthestethoscopeisusedandshouldbepresentwhileusingthebell;theoppositeistrueforasplitS2.Also,theS3soundisheardbestatthecardiacapex,whereasasplitS2isbestheardatthepulmoniclisteningpost(leftuppersternalborder).TobesthearaS3,thepatientshouldbeintheleftlateraldecubitusposition. RelatedContent: HeartSoundsTopicReview HeartSoundsQuiz S1HeartSoundTopicReview S2HeartSoundTopicReview S4HeartSoundTopicReview ExtraHeartSounds Readmoreabout mitralvalve Facebook Twitter LinkedIn Email Print Comment ContinueReading RelatedContent Save Save Save We’resorry,butanunexpectederrorhasoccurred. Pleaserefreshyourbrowserandtryagain.Ifthiserrorpersists,[email protected]. Close
延伸文章資訊
- 1The S3 Gallop | SpringerLink
A ventricular gallop sound is an extra heart sound. · S3 gallop is a low frequency, early to mid-...
- 2Third heart sound - Wikipedia
The third heart sound or S3 is a rare extra heart sound that occurs soon after the normal two "lu...
- 3Mechanism of physiologic and pathologic S3 gallop sounds
Although the S3 gallop sound has long been used clinically as an indicator of left ventricular sy...
- 4S3 Heart Sound Topic Review | Learn the Heart - Healio
The third heart sound (S3), also known as the “ventricular gallop,” occurs just after S2 when the...
- 5The S3 Gallop - Thoracic Key
A ventricular gallop sound is an extra heart sound. · S3 gallop is a low frequency, early to mid-...
