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Chambers of the Heart

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...

Development of the Heart

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...

Stomach Histology

Stomach Histology

The stomach comprises several layers that work together to facilitate digestion and protect the organ. The outermost layer is called the serosa, which provides support and protection to the stomach. The muscularis externa layer is responsible for the mechanical breakdown of food by contracting and moving the stomach. The submucosa layer, located beneath the muscularis externa, contains connective tissue, blood vessels, nerves, and glands that secrete mucus and other substances essential for...

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral Stenosis II: Clinical features and Diagnostic Tests

Mitral stenosis is a heart condition in which the mitral valve, which allows blood to flow from the left atrium to the left ventricle, becomes narrowed or stenotic. This narrowing hinders blood flow and leads to clinical symptoms requiring specific medical evaluations and management strategies. The following overview outlines the clinical symptoms, assessments, diagnostic findings, prevention methods, and treatments for mitral stenosis.Clinical ManifestationsDyspnea (shortness of breath): This...

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Updated: Jul 17, 2026

Analysis of Coronary Vessels in Cleared Embryonic Hearts

Analysis of Coronary Vessels in Cleared Embryonic Hearts

Published on: December 7, 2016

早期性心室複合体の形態学. 左心室の構造と機能のマーカーである.

K P Moulton¹, T Medcalf, R Lazzara

¹Department of Medicine, Oklahoma Medical Center, Oklahoma City 73190.

|April 1, 1990

まとめ

早期心室複合体 (PVCs) の形状は,基礎となる心筋疾患を示す可能性があります. PVCの広いは,滑らかなPVCとは異なり,充血性心不全と拡張性心筋症に関連しています.

科学分野:

心臓病学心臓病学
電気生理学電気生理学
心臓画像検査 (Cardiac Imaging) について

背景:

早期心室複合体 (PVC) は,一般的な心律不整症です.
心電図 (ECG) のPVC形態は,心筋疾患と相関することがあります.
このつながりを理解すると,心臓病の診断に役立ちます.

研究の目的:

PVCの形状と心筋梗塞疾患の存在との関係を調査する.
QRS複合体形態学に基づいてPVCを分類する.
PVC形態学群の間の臨床的,ECG,および血管学的違いを特定する.

主な方法:

心臓キャセテリゼーションや核血管撮影を受けているPVC患者100人を分析した.
患者はPVC QRS複合ノッチングに基づいて2つのグループに分けられました:グループ1 (スムーズ/狭いノッチング) とグループ2 (広いノッチング/棚).
臨床データ,ECG,血管学的変数をグループ間で比較した.

主要な成果:

すべての患者は心臓病を患っていましたが,特定の病因がグループを区別することはありませんでした.
グループ2は,第1グループと比較して,心不全 (66%対12%),心筋拡張性 (38%対2%),回性回性 (58%対13%) の割合が著しく高かった.

さらに関連する動画

Tissue Preparation Techniques for Contrast-Enhanced Micro Computed Tomography Imaging of Large Mammalian Cardiac Models with Chronic Disease

Tissue Preparation Techniques for Contrast-Enhanced Micro Computed Tomography Imaging of Large Mammalian Cardiac Models with Chronic Disease

Published on: February 8, 2022

A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse

A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse

Published on: December 16, 2022

関連する実験動画

Last Updated: Jul 17, 2026

Analysis of Coronary Vessels in Cleared Embryonic Hearts

Analysis of Coronary Vessels in Cleared Embryonic Hearts

Published on: December 7, 2016

Tissue Preparation Techniques for Contrast-Enhanced Micro Computed Tomography Imaging of Large Mammalian Cardiac Models with Chronic Disease

Tissue Preparation Techniques for Contrast-Enhanced Micro Computed Tomography Imaging of Large Mammalian Cardiac Models with Chronic Disease

Published on: February 8, 2022

A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse

A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse

Published on: December 16, 2022

グループ2は,PVC QRSの持続時間 (181 ms vs. 134 ms) がより長く,終端ダイアストリック体積指数がより高く (139 ml/m2 vs. 78 ml/m2),射出分数はグループ1よりも低い (0.34 vs. 0.59) でした.

結論:

PVCの形態学,特に広いノッチは,重要な心筋疾患と関連しています.
より広範なPVC QRSの持続時間と特定の形態学的特徴は,エジェクション分数の減少と拡張性心筋病変と相関しています.
PVCの形状は,心筋の健康を評価するための貴重な非侵襲的な指標として機能します.