This paper describes a signal processing algorithm that utilizes wavelet transform and autoregressive modeling to identify heart sounds and to generate clinical features that characterize systolic and diastolic heart murmurs. A wavelet transform (WT) based on the Daubechies wavelet was adopted to facilitate the identification of the first and second heart sounds (S1 and S2) and to isolate systo...

acute rheumatism are not commonly met with in this country, I have thought them worthy of record. For the abstract of the notes of these cases, I am indebted to Mr. Reilly, Assistant Apothecary of the Ward. In both cases the endocardial lining membrane was affected, and valvular murmurs developed ; in the case of AY. M. a systolic bruit was audible loudest over the aortic valves, not at the ape...

Phonocardiographic and pathological features of mitral porcine aortic heterograft valve failure are described in 1o patients with rheumatic valvular disease. Six had isolated mitralporcine aortic heterograft valve; 3 also had one in the aortic area; one had this in both mitral and tricuspid areas with an aortic ball valve prosthesis. Allpatients had systolic murmurs at the apex indicative of mi...

Many normal children have heart murmurs, but most children do not have heart disease. An appropriate history and a properly conducted physical examination can identify children at increased risk for significant heart disease. Pathologic causes of systolic murmurs include atrial and ventricular septal defects, pulmonary or aortic outflow tract abnormalities, and patent ductus arteriosus. An atri...

Many normal children have heart murmurs, but most children do not have heart disease. An appropriate history and a properly conducted physical examination can identify children at increased risk for significant heart disease. Pathologic causes of systolic murmurs include atrial and ventricular septal defects, pulmonary or aortic outflow tract abnormalities, and patent ductus arteriosus. An atri...

Diastolic murmurs have always been considered abnormal, but this report presents nine apparently normal children with high-frequency, early, diamond-shaped diastolic murmurs confirmed by intracavitary phonocardiography to arise within the left ventricle. Each child (aged 5 to 15 years) was referred for evaluation of a systolic murmur at the lower left sternal border, but an additional finding a...

A nationally representative sample of adolescents 12-17 years of age were examined in the U.S. Health Examination Survey and relationships between blood pressure and other variables were explored. During adolescence, blood pressure increases more rapidly in males than in females and only small racial differences are present. Weight has the strongest relationship to both systolic and diastolic p...