関連する実験動画
Updated: Jul 18, 2026

09:45
An Isolated Working Heart System for Large Animal Models
Published on: June 11, 2014
人間の心臓における心室動脈不全の根底にある再侵入および焦点メカニズム
S M Pogwizd1, R H Hoyt, J E Saffitz
1Cardiovascular Division, Washington University School of Medicine, St. Louis, MO 63110.
Circulation
|December 1, 1992
まとめ
心筋梗塞の患者における心室性短拍 (VT) のメカニズムには,室内再侵入と焦点トリガーが含まれます. この研究では,3Dマッピングを使用して,耐火性VTのこれらの根本的な原因を特定しました.
科学分野:
- 心臓病学 心臓病学
- 電気生理学 電気生理学
- 心臓解剖学 心臓解剖学とは
背景:
- 治癒した心筋梗塞の患者における不治性心室性低心力症 (VT) は,重要な臨床的課題を提示する.
- VTの正確なメカニズムの理解は,効果的な治療戦略の開発に不可欠です.
研究 の 目的:
- 前回の心筋梗塞を患った患者における持続心室性低心率 (VT) の根本的なメカニズムを解明する.
- 詳細な電気生理学的マッピングを使用して,再侵入者および焦点VTの起源を区別する.
主な方法:
- 術内3次元電気解剖学マッピングは,治癒した心筋梗塞と耐火性静脈動脈梗塞を有する13人の患者に実施されました.
- マッピングには,VT回路を定義するために,最大156の室内部位の詳細な分析が含まれていました.
- 組織病理学的分析は,傷痕組織と伝導異常を特定するためにマッピングデータと相関していた.
主要な成果:
- 8人の患者の10件の持続性VTを分析し,2つの主要なメカニズム,すなわち内壁内での再侵入と焦点開始を明らかにした.
- 内静脈再入は,多くの場合,伝導の遅延とブロックが顕著なサブエンドカルディアまたはエピカルディアの回路を伴うもので,VTsの半分を占めました.
- VTsの他の半分は,ビート間の電気活動の欠如によって特徴づけられる焦点メカニズムから発生し,室内録音にもかかわらず.
結論:
- イントラムラ再入力と焦点メカニズムの両方が,治癒した心筋梗塞の文脈で,持続した心室動脈不全症に大きく貢献しています.
- 導管異常は,心臓発作の位置と隣接する線維組織の影響を受け,マクロエントラントVTにおいて重要な役割を果たします.
- これらの独特なメカニズムを理解することは,アブレーション戦略を導き,患者のアウトカムを改善するために不可欠です.
関連する概念動画
Anatomy of the Heart
The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
Overview of the Heart
The heart, a muscular organ located in the chest, functions as the body's pump, circulating blood through the vascular system. It has four chambers: two atria on top and two ventricles below. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and transfers it to the left ventricle, which pumps it to the rest of the body.
The heart's structure...
The heart's structure...
Heart Valves
The human heart is a complex organ with an intricate system of valves that regulate blood flow. There are two main types of valves: atrioventricular (AV) valves and semilunar valves.
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
Conduction System of the Heart
Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
Anatomy of the Heart
The heart is a hollow, muscular organ approximately the size of a fist, consisting of four chambers. It is enclosed in the pericardium, a fibrous sac with two layers: the visceral and parietal pericardium, separated by a fluid-filled space containing serous fluid to reduce friction.
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...
The heart has three layers: the innermost endocardium, the muscular myocardium, and the outer epicardium, all working together for optimal cardiac function.
Chambers of the Heart
The heart is made up of four...
Conduction System of the Heart
The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
This system relies on the unique properties of nodal and Purkinje cells:...

