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Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

42
IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
42
Mitral Stenosis II: Clinical features and Diagnostic Tests01:23

Mitral Stenosis II: Clinical features and Diagnostic Tests

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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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Mitral Regurgitation I: Introduction01:20

Mitral Regurgitation I: Introduction

55
Mitral regurgitation is characterized by the backward circulation of blood from the left ventricle to the left atrium during systole, a phase of the cardiac cycle when the heart contracts and pumps blood out of the chambers. This abnormal flow occurs primarily due to the dysfunction of the mitral valve or its supporting structures, which include the mitral leaflets, chordae tendineae, annulus, and papillary muscles.Etiology and Mechanisms:Primary Mitral Regurgitation: This type arises from...
55
Chambers of the Heart01:16

Chambers of the Heart

5.9K
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...
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Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

34
Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
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Heart Valves01:16

Heart Valves

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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...
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関連する実験動画

Updated: Sep 10, 2025

Layer Microdissection of Tricuspid Valve Leaflets for Biaxial Mechanical Characterization and Microstructural Quantification
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ミトラル小葉の解剖学的な変異: ユニフィードとアクセサリー・スキャロップ

Buse Naz Çandir Gürses1, Kader Yilar2, Çağla Ergin3

  • 1Department of Anatomy, Faculty of Medicine, Istanbul Yeni Yüzyıl University, Istanbul, Turkey.

Cardiovascular pathology : the official journal of the Society for Cardiovascular Pathology
|August 25, 2025
PubMed
まとめ

健康な個体では 重要な形態学的変化が見られます これらの解剖学的差異は,付属性および統一性のある頭蓋骨を含み,ミトラル弁の修復の手続きにおいて極めて重要です.

キーワード:
アクセサリー・スカロップミトラルパンフレットミトラル・スカロップユニファイド・スカロップ

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Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
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An Image Guided Transapical Mitral Valve Leaflet Puncture Model of Controlled Volume Overload from Mitral Regurgitation in the Rat
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関連する実験動画

Last Updated: Sep 10, 2025

Layer Microdissection of Tricuspid Valve Leaflets for Biaxial Mechanical Characterization and Microstructural Quantification
07:34

Layer Microdissection of Tricuspid Valve Leaflets for Biaxial Mechanical Characterization and Microstructural Quantification

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Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
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An Image Guided Transapical Mitral Valve Leaflet Puncture Model of Controlled Volume Overload from Mitral Regurgitation in the Rat
07:42

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科学分野:

  • アナトミー
  • 心血管外科
  • 医療用イメージング

背景:

  • ミトラル弁の複雑な構造は 心臓の機能に不可欠です
  • ミトラル弁の形状を理解することは 手術の成功に不可欠です

研究 の 目的:

  • ミトラル弁の小葉との形態学的変異を調査する.
  • 健康な個体におけるこれらの変化の形態測定値を決定する.

主な方法:

  • 解剖した新鮮な心臓の分析
  • 心臓の重量,寸法,ミトラル弁の周回りの測定
  • ミトラル・リーフレットとスキャロップの形状,ヒンジの距離,高さの詳細な記録

主要な成果:

  • クラシックな用紙形状は64%で観察された.
  • アクセサリー・スカロップは24%で ユニファイド・スカロップは12%です
  • 年齢,性別,心臓の大きさにかかわらず,貝殻の数と形状の有意な変化

結論:

  • ミトラル弁の小葉と頭蓋骨には大きな形状の違いがある.
  • これらの変異は,ミトラル弁の修復中に手術計画と装置/縫合の配置に影響を与えます.
  • 解剖学的変異は,患者の一般的な特徴に基づいて予測できません.