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Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

700
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...
700
Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

324
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...
324
Acute Coronary Syndrome III: Diagnostic Studies01:30

Acute Coronary Syndrome III: Diagnostic Studies

194
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...
194
Myocarditis II: Clinical Features and Diagnostic Tests01:27

Myocarditis II: Clinical Features and Diagnostic Tests

235
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...
235
Myocarditis I: Introduction01:21

Myocarditis I: Introduction

339
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...
339
Acute Coronary Syndrome IV: Interprofessional Care01:28

Acute Coronary Syndrome IV: Interprofessional Care

197
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...
197

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Paradoxical ST上昇を伴う心筋梗塞：症例報告

Yu-An Chen1,2, Cheng-Chieh Huang1,3, Tsung-Han Lee1,3

  • 1Department of Emergency and Critical Care Medicine, Changhua Christian Hospital, Changhua, Taiwan.

International journal of emergency medicine
|December 22, 2025
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まとめ

心電図電極の配置ミスはST上昇の変化を模倣し、心筋梗塞の誤診につながる可能性があります。異常なパターンを認識し、連続した心電図をレビューすることで、偶発的なリードの反転を特定するのに役立ちます。

キーワード:
四肢の反転ST上昇の移動さまようST上昇

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科学分野:

  • 循環器病学
  • 医療診断

背景:

  • ST上昇心筋梗塞（STEMI）は、迅速な診断を必要とする重篤な状態です。
  • 心電図（ECG）はSTEMI診断に不可欠ですが、ST上昇はさまざまな要因によって移動する可能性があります。
  • ST上昇の移動を引き起こす要因には、リードの配置ミス、冠動脈攣縮、血栓移動、大動脈解離、急性心膜炎が含まれます。

研究 の 目的:

  • 四肢リードの反転による見かけのST上昇の移動の症例を提示すること。
  • 心筋梗塞の診断における正確なECG解釈の重要性を強調すること。
  • ECG解釈における潜在的な落とし穴とその臨床的影響を明らかにすること。

主な方法:

  • 胸痛と動的なECG変化を呈した47歳男性の症例提示。
  • ST上昇の移動を示す連続した心電図の分析。
  • 心臓カテーテル検査の結果による四肢リードの反転の確認。

主要な成果:

  • 観察されたST上昇の移動は、最終的に偶発的な四肢リードの反転に起因すると結論付けられました。
  • 心臓カテーテル検査の結果は、修正されたECG解釈によって示唆された診断を裏付けました。
  • この症例は、電極の配置ミスが一時的で誤解を招くECG所見につながる可能性があることを示しています。

結論:

  • 心筋梗塞における原因血管を特定するためには、ST上昇の正確な同定が重要です。
  • 偶発的なECG電極の配置ミスは誤診につながる可能性があります。
  • 配置ミスの特定には、異常なP-QRSパターンを認識すること、明確な電極のラベリングを使用すること、および連続したECGレビューを実行することが含まれます。