title: Chaotic musical murmur in aortic regurgitation.
abstract: We report an interesting case of aortic regurgitation. Phonocardiographically, the shape of the diastolic musical murmur in this case changed in each cardiac cycle despite being in sinus rhythm, in the same posture and in the same breathing phase. Experimentally, we were able to obtain a similar noise pattern using an artificial respirator and a hemispherical silicone membrane. We concluded that the irregular and chaotic change in the shape of the diastolic musical murmur in the present case occurred due to irregular swaying of the non-coronary cusp under the influence of the Venturi effect owing to a regurgitant jet stream.
authors.affiliation: Division of Cardiology, Shinkyo Hospital, Kagoshima, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Miyahara
authors.forename: S
authors.initials: S
authors.lastname: Amitani
authors.forename: H
authors.initials: H
authors.lastname: Sohara
authors.forename: M
authors.initials: M
authors.lastname: Kurose
authors.forename: H
authors.initials: H
authors.lastname: Iwamura
authors.forename: H
authors.initials: H
authors.lastname: Toyohira
authors.forename: A
authors.initials: A
authors.lastname: Taira
mesh_terms: D001021:Aortic Valve / Q000503:physiopathology / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000000981:diagnostic imaging* / Q000601:surgery; D015150:Echocardiography, Doppler; D006337:Heart Murmurs / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography