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Wiggers diagram of various events of a cardiac cycle, including a phonocardiogram at bottom.

A Phonocardiogram or PCG is a plot of high fidelity recording of the sounds and murmurs made by the heart with the help of the machine called phonocardiograph, or "Recording of the sounds made by the heart during a cardiac cycle." The sounds are thought to result from vibrations created by closure of the heart valves. There are at least two: the first when the atrioventricular valves close at the beginning of systole and the second when the aortic valve and pulmonary valve close at the end of systole. It allows the detection of subaudible sounds and murmurs, and makes a permanent record of these events. In contrast, the ordinary stethoscope cannot detect such sounds or murmurs, and provides no record of their occurrence. The ability to quantitate the sounds made by the heart provides information not readily available from more sophisticated tests, and provides vital information about the effects of certain cardiac drugs upon the heart. It is also an effective method for tracking the progress of the patient's disease.

Phonocardiogram and jugular venous pulse tracing from a middle-aged man with pulmonary hypertension (pulmonary artery pressure 70 mm Hg) caused by cardiomyopathy. The jugular venous pulse tracing demonstrates a prominent a wave without a c or v wave being observed. The phonocardiograms (fourth left interspace and cardiac apex) show a murmur of tricuspid insufficiency and ventricular and atrial gallops.^[1]

References

^ http://www.ncbi.nlm.nih.gov/bookshelf/br.fcgi?book=cm&part=A622&rendertype=figure&id=A633

External links

Some wav files of phonocardiogram [DEAD LINK.]

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English Journal

Modulation of plasma adrenomedullin by epinephrine infusion during head up tilt.

Roessler A, Goswami N, Haditsch B, Hinghofer-Szalkay H.SourceInstitute of Physiology, Center of Physiological Medicine, Medical University of Graz, Harrachgasse 21/5, 8010, Graz, Austria.
European journal of applied physiology.Eur J Appl Physiol.2011 Mar;111(3):531-7. Epub 2010 Oct 6.
We investigated whether head up tilt (HUT) with and without simultaneous epinephrine infusion modulate plasma adrenomedullin. We studied eight healthy male volunteers, using two 5 min 70° HUT trials: control (saline infusion) and intervention (epinephrine infusion, titrated to a dose which increase
PMID 20924597

Telemedicine fetal phonocardiography surveillance: an italian satisfactory experience.

Romano M, Cesarelli M, D'Addio G, Mazzoleni MC, Bifulco P, Ferrara N, Rengo F.SourceDepartment of Biomedical Engineering, University Federico II, Naples, Italy.
Studies in health technology and informatics.Stud Health Technol Inform.2010;155:176-81.
In this paper we describe an Italian experience of fetal home monitor, organized using a portable phonocardiography system (product by Pentavox, Hungary), and the method utilized to evaluate its effectiveness in providing quality services and patient satisfaction. Patient satisfaction is an importan
PMID 20543326

Japanese Journal

運動選手のためのバイタルデータ取得法の検討--心電,心音,血流の変化の検出と心拍測定 (情報理論)

益岡奈央,辻岡哲夫
電子情報通信学会技術研究報告 111(51), 47-52, 2011-05-20
NAID 40018841757

健康女性の腸音と便秘評価との関係

阪本みどり,深井喜代子,田中美穂
川崎医療福祉学会誌 6(2), 341-346, 1996
揚音と排便習慣との関係を65名(24.8±7.6歳)の健康女性で検討した.ベッド臥床させた被験者の腹部皮膚上にマイクロフォンを装着して, 心音計で揚音を記録し, 1分間当たりの腸音数をスパイクカウンターで計測した.この方法で記録すると, 比較的大きな, 高頻度かつ高密度の揚音は, 聴診器できいた揚音によく対応していた.揚音出現数は臥床直後は少なかったが, 30分後まで徐々に増加し, その後安定する …
NAID 110000479170