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 ?
Auscultation revealed mild wheezing throughout the upper lung fields and loud heart sounds throughout his chest that were audible even with gentle contact of the stethoscope diaphragm.
In this study, for the first time in the literature, it was investigated whether sleep apnea could be detected automatically from heart sounds by teaching various classifiers of time and frequency plane parameters which are thought to be able to characterize the morphological changes seen in heart sounds during apnea.
According to the company, the physicians and other qualified clinicians are utilising Rijuven's CardioSleeve in murmur and heart sound analysis, ECG analysis of 22 arrhythmias and interval measurements, heart failure identification, cardiac drug therapy titration, cardiotoxicity and cardiomyopathy, pre-operation planning and post-operation follow-up, emergency response as well as hospital discharge patient monitoring clinical applications.
He came back and introduced modern concepts of cardiology like 3rd and 4th heart sounds etc.
A 29 Years old male patient presented with history of shortness of breath (NYHA-II) and clinical examination revealed fixed splitting of 2nd heart sound with ejection systolic murmur 3/6 in left 2nd intercostals space.
On auscultation of the heart, one can hear loud first heart sound, exaggerated splitting, mid systolic murmur and continuous venous hum.
Ayoob Khan TE, Vijayakumar P (2010) Separating heart sound from lung sound using LabView.
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.
The paradoxically split second heart sound predicts left bundle branch block (LBBB).