第3のハート・サウンドの起源 II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II. II.
Circulation
|February 1, 1983
まとめ
人間における第3の心臓音 (S3) は,初期ダイアストロルの間に左心室壁の膨張が突然制限されることによって引き起こされる. この制限は,心臓の頂点で非侵襲的に検出されるマイナスの振動を生み出します.
科学分野:
- 心臓病学 心臓病学
- 生理学 生理学とは
- バイオメディカルエンジニアリング
背景:
- 第3の心臓音 (S3) は一般的な臨床発見ですが,その正確なメカニズムについては依然として議論されています.
- S3の起源を理解することは,様々な心臓病の診断に不可欠です.
研究 の 目的:
- 人間における第3の心臓音 (S3) の根本的なメカニズムを解明する.
- 非侵襲的な発見と侵襲的な血液動力学的測定を相関させるため.
主な方法:
- 皮膚表面加速度計を用いた非侵襲的評価は,心臓の頂点にある.
- 初期下痢期における左心室の寸法 (長軸と短軸) をフレームごとに分析した侵襲性心経管注入.
主要な成果:
- S3の被験者の非侵襲的な追跡は,急速な充填中に明確なネガティブなジャンクを示しました.
- 侵襲的な研究により,長軸の充填の最大値は,短軸の充填後に発生したことが明らかになりました.
- この時間配列は,S3生産のタイミングを,短軸の最大充填と比較して説明するのに役立ちます.
結論:
- 第3の心臓音 (S3) は,左心室の縦方向の膨張の突然の内在的な制限によって発生します.
- この制限は,皮膚表面に伝達される検出可能なネガティブジークを生成します.
関連する概念動画
01:15Heart Sounds
Heart sounds are generated by the turbulence in blood flow due to the closing of heart valves. These sounds are best perceived slightly away from the valves, where the blood flow disseminates the sound.
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
Auscultation is the process of listening to these internal body sounds using a stethoscope. The heart produces four types of sounds, but only two—S1 and S2—can usually be heard with a stethoscope.
S1, also known as the "lub" sound, is caused by the closure of atrioventricular (A-V) valves at the...
01:25Assessment of the Cardiovascular System IV: Auscultation
Cardiac auscultation is a clinical skill used to assess heart function and detect abnormalities. It involves listening to heart sounds at specific anatomical locations through a stethoscope.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
Normal Heart Sounds
S1 (First Heart Sound)-
S1 is made by the closure of the mitral and tricuspid valves (atrioventricular valves), marking the beginning of systole.
S2 (Second Heart Sound)-
S2 is made by the closure of the aortic and pulmonic valves (semilunar valves), marking the end of the systole.
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Auscultation, an essential part of a heart examination, is done using a stethoscope. It provides crucial information about heart function and possible heart problems. Due to heart problems, abnormal sounds can be heard during systole or diastole. These sounds include S3 and S4 gallops, opening snaps, systolic clicks, and murmurs.
Abnormal Heart Sounds
Gallops:
Abnormal Heart Sounds
Gallops:
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