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Pansystolic murmurs in patients with mitral and tricuspid valve regurgitation or ventricular septal defect may be confirmed by phonocardiography. They are caused by a flow of blood from a chamber or vessel that is at a higher pressure throughout systole than the receiving vessel or chamber.
A phonocardiogram (PCG) plots recordings of a heart sound and murmur during the cardiac cycle, and analysis of a PCG signal is useful in detecting abnormalities of a heart by using time-frequency analysis and classifications of the heart signals (Milani, Emeroylariffion, Silva, & Nanayakkara, 2021).
Phonocardiography is a diagnostic technique that graphically records cardiac acoustic phenomena. 10 Visualization of heart sounds may help in understanding cardiac events . A visual record may also help an inexperienced listener recognize and classify auscultatory findings.
15 mar 1996 · The limitations of graphic display are much the same as those of phonocardiography in general, especially in the detection and display of high-frequency murmurs such as those produced by aortic regurgitation.
30 paź 2021 · To date, a critical aspect that limits the applicability of clinical phonocardiography is the technical difficulty of acquiring high-quality PCG signals. This is due to two main reasons: The quality of the recordings strongly depends on the positioning of the digital stethoscope [15, 16, 17, 18].
Phonocardiography. The phonocardiogram (PCG) detects and records heart sounds, the sounds made by the various cardiac structures pulsing and moving blood. The sound is caused by the acceleration and deceleration of blood and turbulence developed during rapid blood flow.
Phonocardiograms are visual representations of heart sounds that have been used for diagnosis [4, 5] and have been advanced as a curricular approach to teach students the typical shape, timing, and duration of heart murmurs that correspond to specific disease processes [6, 7].
