title: The fourth heart sound-easier to feel than to hear.
authors.affiliation: Cardiac Rehab, Cardiac Rehabilitation Center, Alton, Hants, UK. bethell@cardiac-rehab.co.uk
authors.forename: Hugh
authors.initials: H
authors.lastname: Bethell
mesh_terms: D006347:Heart Sounds; D006801:Humans; D009200:Myocardial Contraction; D010173:Palpation; D010701:Phonocardiography