idiopathic hypertrophic subaortic stenosis. idiopathic hypertrophic subaortic stenosis. idiopathic hypertrophic
Circulation
|November 1, 1975
まとめ
Idiopathic hypertrophic subaortic stenosis (IHSS) は,隔膜の収縮速度が低下したが,後部壁の収縮速度が増加し,全体的なハイパーダイナミックな収縮にもかかわらず,非対称な心室機能を示している.
科学分野:
- 心臓病学 心臓病学
- 心血管生理学 心血管の生理学
- メディカルイマージング (医学イメージング)
背景:
- Idiopathic hypertrophic subaortic stenosis (IHSS) は,主発性ミオパシー症候群の1つとして挙げられている.
- IHSSは,高動力性心房収縮によって特徴付けられます.
- IHSSにおける地域収縮性のパターンは,さらなる調査を必要とする.
研究 の 目的:
- IHSSにおける地域収縮性を評価するために,シストリック壁の厚みと収縮速度を測定します.
- IHSS患者のセプトと後部壁の機能を正常な被験者と比較するために.
主な方法:
- エコーカルディオグラフィーは,シストリック壁の厚みと収縮の速度を測定するために使用されました.
- 16人のIHSS患者と16人の正常な被験者を研究に含めました.
- 隔膜と左心室の裏壁の測定が行われました.
主要な成果:
- IHSSの隔膜は,IHSSの裏壁と正常隔膜と比較して,著しく少ない厚みを示しました.
- IHSSにおけるセプトの収縮速度は,正常な被験者とIHSSの背面壁の収縮速度より著しく遅かった.
- IHSSの背面壁は,通常の心室よりも速い収縮速度を示しており,補償機能を示唆しています.
結論:
- IHSSは機能的な左心室非対称性を示し,低動力性隔膜と高動力性後壁を有する.
- 地域収縮性は,総合的な高動力室機能にもかかわらず,IHSSでは均一ではありません.
- 研究結果は,IHSSを非対称性筋症として分類することを支持しています.
関連する概念動画
01:19Electrophysiology of Normal Cardiac Rhythm
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase of...
01:26Imbalances in Cardiac Output
The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
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.
01:29Cardiovascular System Abnormal Findings I: Inspection and Palpation
In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
Abnormal findings observed during an inspection
Abnormal findings observed during an inspection
01:25Cardiovascular System Abnormal Findings II: Auscultation
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:
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...