Related Experiment Video

Updated: Aug 11, 2026

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
18:11

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

Published on: December 28, 2012

A case of myocardial infarction due to acute left main coronary artery occlusion presenting with peculiar

Atila Bitigen1, Yusuf Karavelioglu, Evren Kaynak

  • 1TRT-Marmara Sitesi E-Blok, No:10 Ulus/Beşiktaş, Istanbul, Turkey. bitigen@yahoo.com

The International Journal of Cardiovascular Imaging
|March 7, 2006
PubMed

Insights

Acute left main coronary artery occlusion, a rare cause of myocardial infarction (MI), can be diagnosed with specific ECG findings. Early detection of ST elevation in lead aVR alongside right bundle branch block is critical for prompt intervention and improved outcomes.

Area of Science:

  • Cardiology
  • Emergency Medicine
  • Diagnostic Imaging

Background:

  • Acute left main coronary artery (LMCA) occlusion is a rare but life-threatening cause of myocardial infarction (MI).
  • Prompt diagnosis and revascularization are crucial to prevent cardiogenic shock and high mortality rates.
  • Electrocardiography (ECG) is a vital tool for early diagnosis of acute coronary syndromes and risk stratification.

Observation:

  • A patient presented with acute MI and cardiogenic shock.
  • Initial ECG revealed right bundle branch block (RBBB) and ST-segment elevation in lead aVR.
  • Coronary angiography confirmed total occlusion of the LMCA.

Findings:

  • The case highlights a rare presentation of LMCA occlusion.
  • Specific ECG findings, including ST elevation in aVR and RBBB, can indicate LMCA occlusion.
  • These peculiar ECG changes, often overlooked, are critical for timely diagnosis.

Implications:

  • Emphasizes the importance of recognizing subtle ECG abnormalities in diagnosing critical coronary events.
  • Highlights the potential for ST elevation in aVR to be a key indicator of LMCA occlusion.
  • Underscores the need for prompt invasive intervention in patients with suspected LMCA occlusion based on ECG findings.

More Related Videos

Confirmation of Myocardial Ischemia and Reperfusion Injury in Mice Using Surface Pad Electrocardiography09:23

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

Published on: November 24, 2016

Related Concept Videos

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations01:19

Acute Coronary Syndrome II: Pathophysiology and Clinical Manifestations

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...
Acute Coronary Syndrome I: Introduction01:30

Acute Coronary Syndrome I: Introduction

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

Acute Coronary Syndrome III: Diagnostic Studies

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

Myocarditis II: Clinical Features and Diagnostic Tests

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

Coronary Artery Disease III: Clinical Manifestations

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...
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...