Heart Sound

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Heart Sound


the sound accompanying heart function. Occurring at regular intervals during specific phases of the cardiac cycle, heart sounds are rapid aperiodic sound oscillations.

Two basic heart sounds are distinguished during auscultation of the heart and phonocardiography. The first sound, which occurs at the beginning of the systole, is caused by myocardial tension, valve function, and the vibration of the walls of major vessels. The second sound occurs with the closure of the semilunar valves at the beginning of the diastole. A physiological third sound is often detected in children and adolescents.

A change in the nature or number of heart sounds, such as the occurrence of palpitations, may indicate the development of heart failure or the existence of heart disease or certain other afflictions.

References in periodicals archive ?
The Bluetooth-connected mobile app, available from the Apple App Store, allows clinicians to view a heart sound waveform, save heart sounds directly to a patient's EHR, and collaborate securely with a cardiologist for a second opinion.
The first heart sound was soft, the second heart sound was widely split with an accentuated pulmonary component, and the left ventricular third heart sound was heard over the apex.
The system is comprised of an app that runs on a mobile device and a server-based heart sound analysis software.
The "AH" is a universal, non-denominational heart sound that, when projected with focused energy, is extremely powerful and effective," says Goldman.
Conquering heart sound team - Craig, Joe, Ade and Dean |
A A MURMUR is an abnormal heart sound that is caused by increased blood flow through either the valves of the heart or a hole in the heart.
The Sonr sensor is designed to measure patients' cardiac muscle vibrations related to the first heart sound.
Posttest Results Grouping by Heart, Lung and Bowel Sounds n Mean Median SD Range Control Heart sound score (n =10) 35 1.
An integrative literature review was undertaken to explore historical developments to the process of listening to the fetal heart from the initial discovery of the fetal heart sound in 1650 and its rediscovery again in 1818.
Researchers at the University of Colorado fed heart sound recordings from patients with innocent murmurs and those with abnormal murmurs into a neural network to train the system to recognise the differences.
Laennec distinguished two heart sounds but attributed the first heart sound to ventricular systole and the second sound to atrial systole.
She hears a wide physiological splitting of the second heart sound, with a loud aortic component, but no third heart sound.