title: In response to: Nygaard H, Thuesen L, Hasenkam JM, Pedersen EM. Assessing the severity of aortic valve stenosis by spectral analysis of cardiac murmurs (spectral vibrocardiography) Part I and Part II.
authors.forename: J D
authors.initials: JD
authors.lastname: Carroll
authors.forename: K E
authors.initials: KE
authors.lastname: Hellman
mesh_terms: D001021:Aortic Valve / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D006328:Cardiac Catheterization / Q000295:instrumentation; D005583:Fourier Analysis; D006337:Heart Murmurs; D006439:Hemodynamics / Q000502:physiology*; D006801:Humans; D010701:Phonocardiography / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013018:Sound Spectrography / Q000295:instrumentation*