The Journal of the Acoustical Society of America · 1957 · 24 citations · 0 references
MedicineAnatomyCardiologyAcousticsAuditory AnatomyElectrophysiologyElectrode PlacementSound LocalizationSound MappingBarium TitanateCatheter Tip LocalizationHeart Sound AnalysisHeart Sound AuscultationHeart Sound InterpretationStrontium Barium Titanate
A cylindrical barium titanate element has been placed at the distal end of a specially designed catheter and used in studies of the heart sounds of dogs and humans. Heart sounds have been recorded with the element located in the four chambers of the heart as well as in the great vessels leading from the heart. X-ray photographs monitored the location of the catheter tip in each case. The sounds have been recorded on tape and simultaneously on a photographic galvanometer recorder, all studies were continuously monitored by electrocardiogram. Sound spectrographic analysis of the several sounds was made and analyzed.