Cardiac curves and sounds

An Integrated Framework for Cardiac Sounds Diagnosis

The forces needed to evoke sounds from cardiac tissues, and the attenuation of heart sounds.

A BRIEF SERIES of experiments' showed that relatively little force is required to evoke loud sounds when leaflets and chordae of the cardiac valves are drawn taut under water, although large forces are required to evoke sounds from strips of heart muscle. In order to obtain some quantitative data on the relation of tensing force to noise, it was necessary to devise a noise-free method for apply...

A Study of Cardiac Sounds and Murmurs in Severe Anæmia

Automatic classification of normal and abnormal cardiac sounds by combining features based on wavelet transform and capstral coefficients extracted from PCG signals (Research Article)

Cardiac sounds are produced by the mechanical activities of the heart and provide useful information about the function of the heart valves. Due to the transient and unstable nature of the heart's sound and the limitation of the human hearing system, it is difficult to categorize heart sound signals based on what is heard from a stethoscope. Therefore, providing an automated algorithm for prima...

Production of heart sounds by the cardiac catheter.

Extra heart sounds are frequently produced by the cardiac catheter in the human subject during routine cardiac catheterization. They are associated with a characteristic pressure artefact, which suggests that the sound is produced by back-and-forth movement of the catheter tip across the pulmonic valve. Similar sounds, and also murmurs, can be produced by catheter passage across pulmonary or ao...