関連する実験動画
Updated: Aug 19, 2026

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An Isolated Working Heart System for Large Animal Models
Published on: June 11, 2014
まとめ
この研究は,単一心房とL転置を持つ心臓の補助心房 (A-V) ノードを明らかにし,His.の束を形成するために不可欠です. この伝導系を理解することは,外科手術の介入に不可欠です.
科学分野:
- 心臓病学 心臓病学
- ペディアトリック・カルディオロジー
- 心臓の解剖学 心臓の解剖学
背景:
- 単一心室およびL転移を含む先天性心不全は,複雑な解剖学的課題を提示しています.
- これらの心臓の伝導システムの解剖学は完全に理解されていないため,手術の結果に影響を与えます.
研究 の 目的:
- 単一心室と逆のL回路転位を持つ心臓における心臓伝導システムの詳細な解剖を解明する.
- 手術計画とリスク軽減に係る重要な解剖学的ランドマークを特定する.
主な方法:
- 3つの心臓を連続的に切断し,単一の心室と逆のL-トランスポジションで切断します.
- アトリオベントリキュラー (A-V) ノードとヒス・プルキニエ系の詳細な組織学的検査.
主要な成果:
- 基礎的な後部A-Vノードが観察され,His.の束を形成していない.
- アクセサリーの前部AVノードが特定され,His.の束が生じた.
- Hisの束は,主心室内を2つに分け,右と左の束の分岐がはっきりしている.
- 一例では,前節が分裂し,一部はHisの束を形成し,もう一部はMahaimの繊維を放出しています.
結論:
- L-トランポジションの単一心室の伝導システムは,付属の前部A-Vノードから発生します.
- 外科的アプローチは,肺の右側と隔膜欠陥領域を慎重に避ける必要があります.
- 整形外科手術中に導電異常を防ぐために,詳細な解剖学的知識は極めて重要です.
関連する概念動画
The Cardiac Cycle
The heart beats rhythmically in a sequence called the cardiac cycle—a rapid coordination of contraction (systole) and relaxation (diastole).
The Process
Electrical signals—sent from the sinoatrial (SA) node in the right atrial wall to the atrioventricular (AV) node between the right atrium and right ventricle—cause both atria to simultaneously contract. When the signal reaches the AV node, it pauses for approximately a tenth of a second, allowing the atria to contract and empty blood into the...
The Process
Electrical signals—sent from the sinoatrial (SA) node in the right atrial wall to the atrioventricular (AV) node between the right atrium and right ventricle—cause both atria to simultaneously contract. When the signal reaches the AV node, it pauses for approximately a tenth of a second, allowing the atria to contract and empty blood into the...
Chambers of the Heart
The human heart is a complex organ made up of four chambers: the right and left atria and the right and left ventricles. These internal chambers are separated by partitions known as the interatrial and interventricular septa. The exterior of the heart features a groove known as the coronary sulcus that demarcates the atria from the ventricles, while the anterior and posterior interventricular sulci distinguish between the two ventricles.
Deoxygenated blood from the body is received in the right...
Deoxygenated blood from the body is received in the right...
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...
Development of the Heart
The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
As the embryo undergoes lateral folding, these paired tubes approach each other, merging into a single primitive heart tube by...
As the embryo undergoes lateral folding, these paired tubes approach each other, merging into a single primitive heart tube by...
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:...

