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相关概念视频

Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

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Diagnosing acute coronary syndrome or ACS begins with a thorough patient history. Notable symptoms include central, crushing chest pain radiating to the left arm, neck, jaw, or back, along with shortness of breath, sweating (diaphoresis), nausea, vomiting, dizziness, and palpitations.It is crucial to note any history of cardiac illnesses and assess risk factors, including age, gender, smoking, hypertension, diabetes, hyperlipidemia, and a sedentary lifestyle.During physical examination, vital...
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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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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...
942
Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

477
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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Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers01:19

Blood Studies for Cardiovascular System II: CRP, Hcy, and Cardiac Natriuretic Peptide Markers

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Cardiac biomarkers are critical in diagnosing, prognosing, and managing cardiovascular diseases. Routine measurement of specific biomarkers such as B-type natriuretic peptide (BNP), C-reactive protein (CRP), and homocysteine (Hcy) is common practice in clinical settings to evaluate heart function and predict cardiovascular events.
These markers indicate stress or strain on the heart muscle:
Natriuretic Peptides (BNP)
Cardiac myocytes produce these hormones in response to ventricular stretching...
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Acute Coronary Syndrome IV: Interprofessional Care01:28

Acute Coronary Syndrome IV: Interprofessional Care

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IntroductionThe management of Acute Coronary Syndrome (ACS) aims to minimize myocardial damage, preserve myocardial function, and prevent complications.Initial ManagementInpatient management involves continuous cardiac monitoring, preferably in an ICU, focusing on blood pressure, serum sodium, potassium, and creatinine levels, and urine output. Ongoing pharmacologic management is crucial for stabilizing the patient.Supplemental Oxygen: Administer supplemental oxygen if oxygen saturation is...
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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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在疑似患有急性冠状动脉综合征的患者中,高灵敏性心脏Troponin I度与心脏结果的关联

Andrew R Chapman1, Kuan Ken Lee1, David A McAllister2

  • 1BHF Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, Scotland.

JAMA
|November 12, 2017
PubMed
概括

低于5ng/ L的高敏感性心脏素I水平有效地识别了疑似急性冠状动脉综合征的低风险患者. 这一门表明30天内心肌梗塞或心脏死亡的高负预测值.

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科学领域:

  • 心脏病学
  • 生物标志物
  • 诊断的准确性

背景情况:

  • 对于诊断急性冠状动脉综合征 (ACS) 来说,高灵敏性心脏素I (hs-cTnI) 是至关重要的.
  • 通常使用hs- cTnI度<5 ng/ L来识别低风险患者,但其最佳风险分层门仍然不确定.

研究的目的:

  • 在疑似ACS患者中评估hs- cTnI值为5ng/ L的风险分层的性能.
  • 为了确定这个值在预测心肌梗塞或心脏死亡时的准确性.

主要方法:

  • 2006年至2017年主要数据库 (MEDLINE,EMBASE,Cochrane,科学网) 的系统文献搜索.
  • 对包括22,457名患者在内的19个潜在队列的元分析,其中包括17个队列的个人患者数据.
  • 在2-16 ng/L范围内评估hs-cTnI度,以评估风险分层性能.

主要成果:

  • 在49%的患者中观察到hs- cTnI度< 5 ng/ L (11,012/22,457).
  • 这一低hs- cTnI组对主要结果 (心肌梗塞或30天内心脏死亡) 的预测值为99. 5% (95% CI,99. 3%- 99. 6%).
  • 这一低风险组在30天内没有发生心脏病死亡,心脏病死亡预测值为99. 9%.

结论:

  • 低于5ng/ l的hs- cTnI度可靠地识别出疑似心肌梗塞或心脏死亡风险较低的患者.
  • 建议进行进一步的研究,以探索这种风险分层策略的临床效用和成本效益.
  • 这些发现支持使用5 ng/ L的hs- cTnI值来排除在特定患者群体中的ACS.