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関連する概念動画

Vascular Spasm01:16

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...
Layers of the Heart Wall01:15

Layers of the Heart Wall

The heart wall comprises three distinct layers: the epicardium, myocardium, and endocardium. The outermost layer, the epicardium, is the visceral layer of the serous pericardium, featuring a thin, transparent mesothelial surface and an inner layer of areolar connective tissue with fat deposits that increase with age.
The myocardium, the thickest layer, consists of cardiac muscle cells interconnected by intercalated discs and crisscrossing connective tissue fibers. These muscle fibers contract...
Heart Valves01:16

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...
Myocarditis I: Introduction01:21

Myocarditis I: Introduction

Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
Angina I: Introduction01:30

Angina I: Introduction

Definition and Symptoms: Angina (angina pectoris) is chest pain or discomfort caused by myocardial ischemia, which occurs when the heart muscle receives insufficient oxygen-rich blood. It typically manifests as pressing, squeezing, or crushing sensations in the chest and may radiate to the shoulders, arms, neck, jaw, or back.Primary Cause: In a healthy state, the coronary arteries can dilate (widen) to increase blood flow and meet the increased oxygen demand during physical activity or...
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation01:21

Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation

Clinical manifestationsPeripheral Arterial Disease (PAD) manifests through a range of symptoms, from the characteristic intermittent claudication to atypical presentations and severe complications in advanced stages. Intermittent claudication, a hallmark symptom of PAD, presents as exercise-induced muscle pain that typically resolves within minutes of rest. This pain is reproducible and stems from inadequate blood flow, leading to the accumulation of lactic acid produced during anaerobic...

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Updated: Jun 28, 2026

Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders
06:39

Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders

Published on: August 18, 2016

プロテスの大動脈弁内膜内膜炎

J Madison, K Wang, F L Gobel

    Circulation
    |May 1, 1975
    PubMed
    まとめ
    この要約は機械生成です。

    人工大動脈弁内心炎 (PAVE) は,弁置換手術後の重篤な合併症である. 早期の大動脈不全は予後が悪いことを示し,遅いまたは欠席した不全は,医療または手術による治療でより良い結果を示唆します.

    さらに関連する動画

    3D Whole-heart Myocardial Tissue Analysis
    06:53

    3D Whole-heart Myocardial Tissue Analysis

    Published on: April 12, 2017

    Preclinical Model of Hind Limb Ischemia in Diabetic Rabbits
    07:34

    Preclinical Model of Hind Limb Ischemia in Diabetic Rabbits

    Published on: June 2, 2019

    関連する実験動画

    Last Updated: Jun 28, 2026

    Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders
    06:39

    Intracoronary Acetylcholine Provocation Testing for Assessment of Coronary Vasomotor Disorders

    Published on: August 18, 2016

    3D Whole-heart Myocardial Tissue Analysis
    06:53

    3D Whole-heart Myocardial Tissue Analysis

    Published on: April 12, 2017

    Preclinical Model of Hind Limb Ischemia in Diabetic Rabbits
    07:34

    Preclinical Model of Hind Limb Ischemia in Diabetic Rabbits

    Published on: June 2, 2019

    科学分野:

    • 心臓病学 心臓病学
    • 感染症 感染症は感染症です.
    • 心臓外科手術について

    背景:

    • 感染症性内心炎 (IE) は,心血管外科手術,特に弁置換術後の深刻な合併症です.
    • 人工大動脈弁内心炎 (PAVE) は,ユニークな臨床的課題を提示しています.
    • PAVEの経路を理解することは,患者の管理に不可欠です.

    研究 の 目的:

    • PAVEの臨床経過を明確にするために.
    • PAVEにおける外科介入の役割を評価する.
    • PAVE患者の予後要因を特定するために.

    主な方法:

    • 16人の成人PAVE患者からの臨床および解剖データの遡及的レビュー.
    • PAVEに関する既存の文献との比較.
    • 血液培養物の分析,臨床プレゼンテーション,解剖結果.

    主要な成果:

    • グラム陽性バクテリアが主たる病原体であった.
    • 感染の発症は通常,術後25日以上でした.
    • 大動脈不全は11/16の患者で存在し,しばしば周腹と関連していました.
    • 早期の大動脈不全は死亡率と相関していた.
    • 遅れたまたは欠席した大動脈不全は,特に効果的な医療療法によって,よりよい生存率を予測しました.

    結論:

    • 周弁腔はPAVEの一般的な発見であり,外科的結果を複雑にします.
    • 大動脈不全のタイミングは,重要な予後指標です.
    • 迅速な手術用弁置換は,左心房機能不全がない場合でも,医学的反応が悪い場合,または漸進的な大動脈不全の場合に示されています.