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Related Concept Videos

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...
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...
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...
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...
Imbalances in Cardiac Output01:26

Imbalances in Cardiac Output

The heart's primary function is to pump blood throughout the body, maintaining a balance between blood sent out (cardiac output) and blood returning (venous return). If this balance is disrupted, it can result in congestive heart failure (CHF), a severe condition where the heart becomes an inefficient pump, leading to inadequate blood circulation.
CHF can occur due to the failure of either side of the heart. Left-side failure leads to pulmonary congestion—the right side continues to send blood...
Ischemic Heart Disease: Overview01:17

Ischemic Heart Disease: Overview

Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and narrowing...

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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
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

Silent myocardial ischemia.

David D Gutterman1

  • 1Medical College of Wisconsin, Milwaukee, WI 53226, USA. dgutt@mcw.edu

Circulation Journal : Official Journal of the Japanese Circulation Society
|March 14, 2009
PubMed
Summary
This summary is machine-generated.

Silent myocardial ischemia, often undetected, contributes to heart attacks and sudden death. This review explores its mechanisms, clinical features, and prognostic significance, proposing a new theory for silent ischemia.

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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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Area of Science:

  • Cardiology
  • Cardiovascular Disease Research

Background:

  • Ischemic cardiovascular disease is a leading global cause of death.
  • Over half of patients experience heart attack or sudden death as initial symptoms.
  • The majority of myocardial ischemic episodes are silent, indicating a failure to sense cardiac stress.

Purpose of the Study:

  • To review the clinical characteristics of silent myocardial ischemia.
  • To explore mechanisms of angina pectoris and silent ischemia.
  • To propose a new theory for the mechanism of silent ischemia.

Main Methods:

  • Literature review of clinical characteristics and mechanisms of silent myocardial ischemia.
  • Exploration of existing theories on angina pectoris and silent ischemia.
  • Proposal of a novel theoretical framework for silent ischemia.

Main Results:

  • Silent myocardial ischemia is a common, often unrecognized, manifestation of coronary disease.
  • Existing theories on angina pectoris do not fully explain silent ischemia.
  • A new theory is proposed to elucidate the mechanisms underlying silent ischemia.

Conclusions:

  • Silent myocardial ischemia has significant prognostic implications.
  • Further research is needed to understand and manage silent ischemia.
  • Investigating the proposed theory may offer new insights into preventing catastrophic cardiac events.