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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 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...
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...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...

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Related Experiment Video

Updated: Jun 24, 2026

A Research Method For Detecting Transient Myocardial Ischemia In Patients With Suspected Acute Coronary Syndrome Using Continuous ST-segment Analysis
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Published on: December 28, 2012

Acute myocardial infarction with changing axis deviation.

Salvatore Patanè, Filippo Marte

    International Journal of Cardiology
    |March 27, 2009
    PubMed
    Summary

    Changing axis deviation during acute myocardial infarction is rare but significant. This case highlights its occurrence and importance in diagnosing heart conditions.

    Area of Science:

    • Cardiology
    • Electrocardiography
    • Cardiac Electrophysiology

    Background:

    • Changing axis deviation is infrequently observed during cardiac arrhythmias like atrial fibrillation or flutter.
    • Its occurrence during acute myocardial infarction (AMI) is also rarely documented, especially when associated with arrhythmias.

    Observation:

    • This case report details a 62-year-old Italian man presenting with acute myocardial infarction and notable axis deviation.
    • The patient's changing axis deviation was a key clinical observation during the acute phase of myocardial infarction.

    Findings:

    • The study emphasizes the diagnostic significance of axis deviation changes during AMI.
    • Specific hemiblocks, such as left posterior hemiblock or left anterior hemiblock, can indicate coronary artery obstruction and disease severity.

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    Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction

    Published on: October 14, 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
    18:11

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    Published on: December 28, 2012

    Myocardial Infarction and Functional Outcome Assessment in Pigs
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    Myocardial Infarction and Functional Outcome Assessment in Pigs

    Published on: April 25, 2014

    Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction
    14:19

    Primary Outcome Assessment in a Pig Model of Acute Myocardial Infarction

    Published on: October 14, 2016

    Implications:

    • Recognizing changing axis deviation in AMI can aid in identifying coronary artery lesions and assessing left ventricular function.
    • This highlights the need for careful electrocardiographic monitoring in patients with acute myocardial infarction.