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Blood Studies for Cardiovascular System I: Cardiac Biomarkers01:20

Blood Studies for Cardiovascular System I: Cardiac Biomarkers

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Cardiac biomarkers are enzymes, proteins, and hormones released into the blood when cardiac cells are injured. They are powerful tools for triaging.
The essential diagnostic tools for detecting myocardial necrosis and monitoring individuals suspected of having acute coronary syndrome (ACS) include:
Troponins
Troponins, particularly cardiac troponins I and T, are the most precise and sensitive markers of myocardial injury. They are detectable within 4-6 hours of myocardial injury and remain...
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Myocarditis I: Introduction01:21

Myocarditis I: Introduction

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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...
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Coronary Artery Disease III: Clinical Manifestations01:30

Coronary Artery Disease III: Clinical Manifestations

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Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
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Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

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Acute Coronary Syndrome (ACS) encompasses a spectrum of heart conditions caused by sudden obstruction of coronary arteries, typically resulting from the rupture of an atherosclerotic plaque and subsequent thrombus (blood clot) formation. This obstruction can lead to partial or complete blockage of blood flow, causing varying degrees of myocardial ischemia or infarction.ACS includes the following clinical entities:Unstable Angina (UA)Non-ST-Elevation Myocardial Infarction (NSTEMI)ST-Elevation...
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Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

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The pathophysiology of Acute Coronary Syndrome [ACD] involves several key processes:The main underlying cause of ACD is atherosclerosis, a chronic inflammatory disease characterized by the buildup of lipid-laden plaques within the coronary arteries.As the atherosclerotic plaque grows in the coronary artery, it may become unstable due to the formation of a lipid-rich core and a thin fibrous cap. Inflammatory cells within the plaque, such as macrophages, secrete enzymes that degrade the...
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Introduction Cardiac Emergencies01:30

Introduction Cardiac Emergencies

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Cardiac emergencies are critical situations involving the heart that require immediate medical intervention to prevent severe complications or death. These emergencies often arise from underlying heart conditions that impair the heart's ability to function correctly.Types of Cardiac EmergenciesThe most common types of cardiac emergencies include Acute Coronary Syndrome (ACS), myocardial infarction (MI), cardiac arrest, and heart failure.Acute Coronary Syndrome (ACS)Acute Coronary Syndrome (ACS)...
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Myocardial Infarction and Functional Outcome Assessment in Pigs
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心筋梗塞による突然死.

A Selcuk Adabag1, Terry M Therneau, Bernard J Gersh

  • 1Division of Cardiology, Veterans Affairs Medical Center, Minneapolis, Minnesota, USA.

JAMA
|November 6, 2008
PubMed
まとめ

心筋梗塞 (MI) の後の突然心臓死のリスクは,30年以上にわたって減少しています. 心不全は,このリスクを大幅に増加させますが,再発性イシュケミアはそうではありません.

科学分野:

  • 心臓病学 心臓病学
  • 公衆衛生は公衆衛生である.
  • エピデミオロジー エピデミオロジー

背景:

  • 心筋梗塞 (MI) 以後の突然心死 (SCD) リスクは,コミュニティの評価を更新する必要があります.
  • SCDのMI後の再発性イシュケミアと心不全の影響は十分に理解されていません.

研究 の 目的:

  • コミュニティ環境でMI後のSCDリスクを評価する.
  • SCDリスクに対する再発性イシュケミアと心不全の影響を判断する.

主な方法:

  • ミネソタ州オルムステッド郡の2997人の心筋梗塞患者 (1979年−2005年) の集団ベースの監視研究.
  • 2008年までのフォローアップでは,SCDは冠動脈疾患による病院外死亡と定義されています.
  • 観察された生存率と予想された生存率の比較.

主要な成果:

  • SCDの発生率は30日後に1.2%で5年後に6.9%で,予想より大幅に高かった.
  • SCDのリスクは,時間の経過とともに著しく減少しました (HR 0.62 for 1997-2005 vs. 1979-1987).
  • 心不全はSCDのリスクを顕著に増加させました (HR 4.20),再発性イシュケミアはそうではありませんでした (HR 1.26).

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結論:

  • 心臓発作後のSCDのリスクは,30年以上にわたってコミュニティの実践で著しく減少しています.
  • 心不全は,SCDの独立リスク因子である.
  • 再発性イシュケミアは,独立してMI後のSCDリスクの増加と関連していません.