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Autonomous detection of heart sound abnormalities using an auscultation jacket.
Australas Phys Eng Sci Med
December 2009
Department of Mechanical and Mechatronic Engineering, Stellenbosch University, Matieland 7602, South Africa.
This paper presents a study using an auscultation jacket with embedded electronic stethoscopes, and a software classification system capable of differentiating between normal and certain auscultatory abnormalities. The aim of the study is to demonstrate the potential of such a system for semi-automated diagnosis for underserved locations, for instance in rural areas or in developing countries where patients far outnumber the available medical personnel. Using an "auscultation jacket", synchronous data was recorded at multiple chest locations on 31 healthy volunteers and 21 patients with heart pathologies.
View Article and Find Full Text PDFRelationship between accurate auscultation of a clinically useful third heart sound and level of experience.
Arch Intern Med
March 2006
Division of Cardiology, University of California, San Francisco 94143-0124, USA.
Background: Poor performance by physicians-in-training and interobserver variability between physicians have diminished clinicians' confidence in the value of the third heart sound (S3).
Methods: To determine whether auscultation of a clinically useful S3 improves with advancing levels of experience, we performed a prospective, blinded, observational study of 100 patients undergoing left-sided heart catheterization. Patients underwent blinded auscultation by 4 physicians (each from 1 of 4 different levels of experience), phonocardiography, measurement of blood B-type natriuretic peptide levels, echocardiography for measurement of left ventricular ejection fraction, and cardiac catheterization for measurement of left ventricular end-diastolic pressure.
Low intensity heart murmurs in boxer dogs: inter-observer variation and effects of stress testing.
J Small Anim Pract
April 2004
Department of Anatomy and Physiology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, PO Box 7045, 750 07 Uppsala, Sweden.
Inter-observer variation in the detection and grading of low intensity heart murmurs in boxer dogs was investigated. Six veterinarians with different levels of experience examined 27 boxers by cardiac auscultation. The dogs were auscultated before and after exercise, and the results were compared with phonocardiographic and echocardiographic examinations performed at rest and during two different stress tests.
View Article and Find Full Text PDFAuscultation in mild mitral regurgitation in dogs: observer variation, effects of physical maneuvers, and agreement with color Doppler echocardiography and phonocardiography.
J Vet Intern Med
May 1999
Department of Anatomy and Physiology, Royal Veterinary and Agricultural University, Frederiksberg, Denmark.
Observer variation in diagnosing mild mitral regurgitation in dogs by cardiac auscultation was assessed by having 6 veterinarians with different levels of experience examine 57 Cavalier King Charles Spaniels. Comparisons with color Doppler echocardiography and phonocardiography were made, and the effects of 2 physical maneuvers on the auscultatory findings were evaluated. Using mildly diseased dogs, interobserver agreement in diagnosing the presence or absence of left-sided murmurs ranged from 63% to 88%.
View Article and Find Full Text PDF[The mitral valve prolapse syndrome in children and adolescents].
Lijec Vjesn
February 1999
Klinika za djecje bolesti Medicinskog fakulteta Sveucilista u Zagrebu.
The authors studied the prevalence of mitral valve prolapse (MVP) in the group of 656 children and adolescents (329 males and 327 females), who were a representative sample (obtained with the Monte Carlo method of statistical trials) of all newborns in the city of Maribor, Republic of Slovenia, in the period of 18 years (1976-1992). The results were considered positive in children and adolescents who in addition to possible history (chest pain, palpitations, dizziness, loss of consciousness, headaches, perspiration), probable auscultatory finding (mezzosystolic click and late systolic murmur), and suspected phonocardiographic and ECG findings, also had a positive M-mode echocardiographic finding. The criteria for MVP on M-mode echocardiography were taken from the literature: descending of mitral cusp, either anterior or posterior, of at least 3 mm below the line connecting points C and D.
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