background: the basic requirements for monitoring anesthetized patients during surgery are assessing cardiac and respiratory function. esophageal stethoscopes have been developed for this purpose, but these devices may not provide clear heart and lung sound due to existence of various noises in operating rooms. in addition, the stethoscope is not applicable for continues monitoring, and it is u...

Constructing a targeted wavelet neural network is an effective method to enhance network performances and recognition effect. By introducing heart sounds wavelet of neural network hidden layer as the activation function, heart sound targeted learning and recognition technology are integrated deeply, to obtain a new heart sounds wavelet neural network. Selecting normal heart sounds and premature...

The heart sounds of 20 patients with uinecomiplicated atrial septal defect have been analyzed, and the deviations from a normal control group were noted. Following complete closure of the defect 11 patients have been restudied, and the changes produced in the heart sounds by closure of the defect are discussed. By comparison of pre-operative and postoperative heart sounds and electrocardiograms...

Six different time frequency distributions (TFDs) have been used to analyze the fust and second heart sounds. These TFDs have been applied to both simulated heart sound data and to experimeutal phonocardiogram data (N = 6) recorded in the anesthetized dog. Using the distributions, no significant systematic rising frequency component was observed in either the frst or second heart sounds. As rev...

Auscultation of the heart is accompanied by both electrical activity and sound. Heart auscultation provides clues to diagnose many cardiac abnormalities. Unfortunately, detection of relevant symptoms and diagnosis based on heart sound through a stethoscope is difficult. The reason GPs find this difficult is that the heart sounds are of short duration and separated from one another by less than ...

To evaluate the significance of audible gallop sounds in the right supraclavicular fossa we performed simultaneous external heart sound recordings at 50 and 100 Hz at the left ventricular apex, left sternal border, and right supraclavicular fossa in 50 patients with audible gallop sounds at the left ventricular apex. In each patient heart sounds were recorded with a simultaneous jugular phlebog...

The major benefit of a cornmunit) program for the mass evaluation of school children for hemi disease was found to be enhanced distribution of pediatric cardiologr specialty services This enhanced distribution is achieved through use of a computer heart sound analyzer (Phonocardioscan) and by the establishment of a creative partnership between the pediatric cardlologist, the practicing physicia...