Related Experiment Video

Updated: Jul 31, 2026

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure
07:41

Echocardiographic Evaluation of Atrial Communications before Transcatheter Closure

Published on: February 8, 2022

Intramural coronary artery dysplasia of the ventricular septum and sudden death

A P Burke1, R Virmani

  • 1Department of Cardiovascular Pathology, Armed Forces Institute of Pathology, Washington, DC 20306-6000, USA.

Human Pathology
|October 22, 1998
PubMed

Insights

Sudden cardiac death in young adults can be caused by intramural coronary artery dysplasia, a small vessel disease affecting the ventricular septum. This condition, marked by artery thickening and narrowing, may occur without prior heart issues or family history.

Area of Science:

  • Cardiovascular Pathology
  • Sudden Cardiac Death Etiology
  • Coronary Artery Disease

Background:

  • Sudden unexpected death in young adults is a critical concern.
  • Identifying the underlying causes is crucial for prevention and understanding.
  • Previous cardiac history or family history is often absent in these cases.

Observation:

  • Four cases of sudden unexpected death in individuals aged 12-31 years were analyzed.
  • Death occurred during exercise in three of the four cases.
  • Autopsies revealed marked intramural coronary artery dysplasia of the ventricular septum.

Findings:

  • The coronary artery dysplasia showed severe medial thickening, smooth muscle cell disorganization, and luminal narrowing.
  • Myocardial fibrosis was present in three of the four cases.
  • No evidence of hypertrophic cardiomyopathy or other significant cardiac/extracardiac lesions was found, except for an atrial septal defect in one case.

Implications:

  • Intramural coronary artery disease of the ventricular septum can be an isolated cause of sudden cardiac death in young adults.
  • This finding highlights the importance of investigating small vessel coronary abnormalities.
  • Understanding these specific pathologies may aid in risk stratification and prevention strategies for sudden cardiac death.

More Related Videos

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China08:42

Cox-Maze IV Procedure Concomitant with Valvular Surgery In Situs Inversus Dextrocardia: A Single-Center Experience in China

Published on: February 11, 2022

A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse08:19

A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse

Published on: December 16, 2022

Related Concept Videos

Coronary Circulation01:21

Coronary Circulation

The heart, an organ critical to survival, gets nourishment not from the blood it pumps but from a separate circulation system known as coronary circulation. This is the shortest circulation in the body and is responsible for supplying the heart with the nutrients it needs to function effectively.
Coronary circulation begins at the base of the aorta, where two main arteries arise—the left and right coronary arteries. These arteries encircle the heart in the coronary sulcus and supply the...
Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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...