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Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

45
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...
45
Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

71
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...
71
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

23
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...
23
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

20
Myocarditis is an inflammation of the heart muscle. The symptoms vary widely, encompassing asymptomatic presentations to severe, acute manifestations.Clinical PresentationAsymptomatic cases: In some instances, myocarditis may be asymptomatic, with the infection resolving without intervention. These cases often go undetected unless discovered incidentally through diagnostic imaging or tests conducted for other reasons.General Early Symptoms: Early symptoms of myocarditis are non-specific and can...
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Acute Coronary Syndrome V: Nursing Management01:26

Acute Coronary Syndrome V: Nursing Management

37
Nursing Assessment:Nursing management of acute coronary syndrome (ACS) involves taking the patient's history, focusing on primary complaints such as chest pain, dyspnea, and excessive sweating (diaphoresis), as well as other symptoms like back or jaw pain, nausea, vomiting, palpitations, dizziness, and fatigue. The nurse also reviews the patient's history of cardiac events, risk factors such as hypertension, diabetes, smoking, family history, and current medications.In the objective assessment,...
37
Electrocardiogram01:29

Electrocardiogram

3.2K
An electrocardiogram (ECG or EKG) is a critical diagnostic tool that records the electrical signals produced by the heart during each heartbeat. This recording is achieved through electrodes placed strategically on the arms, legs, and chest. The electrocardiograph amplifies these signals and produces 12 distinct tracings, offering a comprehensive understanding of the heart's electrical activity.
Three major waveforms are present in a typical ECG recording: the P wave, the QRS complex, and...
3.2K

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Updated: Sep 9, 2025

Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography
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超急性T波は,診断上のST上昇がない場合でも,閉塞性心筋梗塞に特異的です.

H Pendell Meyers1, František Simančík2, Robert Herman3

  • 1Carolinas Medical Center, Department of Emergency Medicine, Charlotte, NC, USA; Powerful Medical, Bratislava, Slovakia.

JACC. Advances
|September 2, 2025
PubMed
まとめ

超急性T波 (HATW) の最初の客観的な定義を確立しました この新しいHATWスコアは,潜在的急性冠動脈症候群の患者の急性冠動脈閉塞を特定するのに役立ちます.

キーワード:
急性冠動脈症候群超急性T波閉塞 心筋梗塞ST エレヴェーション 心筋梗塞ST エレヴェーション 筋動脈梗塞等価

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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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A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis

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Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction
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Last Updated: Sep 9, 2025

Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography
09:23

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Published on: November 24, 2016

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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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Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction
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Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction

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科学分野:

  • 心臓病科
  • エレクトロカルジオグラフィー
  • 緊急 医療

背景:

  • 超急性T波 (HATW) は臨床的に認識されていますが,客観的な定義はありません.
  • アメリカ心臓学会では,HATWをSTEMIに相当するものとして推奨しており,緊急の再注射が必要である.

研究 の 目的:

  • 超急性T波 (HATW) の定量的な定義を導き,検証する.
  • 急性冠動脈閉塞を特定する新しいHATWスコアの臨床的有用性を評価する.

主な方法:

  • 5つのPCIセンターで急性冠動脈症候群 (ACS) の疑いのある成人を遡って分析した.
  • ECGの測定はT波の大きさと対称性を含み,HATWスコアは別々の患者コホートで得られ,検証された.
  • STEMIの基準がない患者の急性冠動脈閉塞のHATWスコアに重点を置いた.

主要な成果:

  • 導出されたHATWスコアの値 (≥0. 7の2つのリード) は,≥98%の特異性を達成した.
  • 検証では,STEMI基準のない患者の急性冠動脈閉塞に対するHATWスコアは98. 4%の特異性を示した.
  • これらの患者のうち,HATWスコアが陽性であった患者の84%は急性心筋梗塞 (AMI) の原因となる病変を発症した.

結論:

  • HATWスコアは,超急性T波の最初の客観的な定義を提供します.
  • このスコアは,潜在的ACS患者における急性冠動脈閉塞の検出に有意な臨床的有用性を示しています.