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Related Concept Videos

Coronary Circulation01:21

Coronary Circulation

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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.
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Coronary Artery Disease I: Introduction01:30

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Coronary Artery Disease (CAD): An Overview with Scientific InsightsCoronary Artery Disease (CAD), often referred to as C-A-D, is a prevalent blood vessel disorder classified under the broader category of atherosclerosis. Atherosclerosis is a pathological process characterized by the hardening and narrowing of arteries due to the accumulation of atherosclerotic plaques. These plaques are composed of cholesterol, fatty substances, inflammatory cells, calcium, and fibrin, reducing blood flow to...
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Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

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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...
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Acute Coronary Syndrome I: Introduction01:30

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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...
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Acute Coronary Syndrome V: Nursing Management01:26

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Nursing Assessment:Nursing management of acute coronary syndrome (ACS) involves taking the patient's history, focusing on primary complaints such as chest pain, dyspnea, and excessive sweating (diaphoresis), as well as other symptoms like back or jaw pain, nausea, vomiting, palpitations, dizziness, and fatigue. The nurse also reviews the patient's history of cardiac events, risk factors such as hypertension, diabetes, smoking, family history, and current medications.In the objective assessment,...
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Coronary Artery Disease V: Interprofessional Care01:27

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Interprofessional care for coronary artery disease includes pharmacological therapy and revascularization procedures.Pharmacological therapy for Coronary Artery Disease (CAD) aims to manage symptoms, prevent complications, and improve patient outcomes through various classes of medications:Antiplatelet Agents:Aspirin and Clopidogrel: These medications inhibit platelet aggregation, preventing blood clots, which is crucial for avoiding heart attacks and strokes. Doctors often prescribe these...
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Oxygenation-sensitive Cardiac MRI with Vasoactive Breathing Maneuvers for the Non-invasive Assessment of Coronary Microvascular Dysfunction
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Coronary microembolization and microvascular dysfunction.

Gerd Heusch1, Andreas Skyschally1, Petra Kleinbongard1

  • 1Institute for Pathophysiology, West German Heart and Vascular Center, University of Essen Medical School, Essen, Germany.

International Journal of Cardiology
|February 13, 2018
PubMed
Summary
This summary is machine-generated.

Coronary microembolization, caused by plaque rupture, obstructs small vessels, leading to microinfarction and worse outcomes. Current strategies do not prevent this, highlighting a need for cardioprotective therapies.

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Area of Science:

  • Cardiovascular Medicine
  • Interventional Cardiology
  • Pathophysiology

Background:

  • Plaque erosion, fissuring, or rupture can occur spontaneously or during coronary interventions.
  • Atherothrombotic debris can obstruct the coronary microcirculation, leading to vasoconstriction, inflammation, and microinfarction.
  • Coronary microembolization contributes to microvascular obstruction in reperfused myocardial infarction, associated with poorer patient prognosis.

Purpose of the Study:

  • To investigate the mechanisms and consequences of coronary microembolization.
  • To highlight the contribution of microembolization to myocardial damage and heart failure.
  • To underscore the lack of established cardioprotective strategies against acute coronary microembolization.

Main Methods:

  • Review of pathological processes following plaque rupture.
  • Analysis of debris flow into coronary microcirculation.
  • Examination of inflammatory and vasoconstrictive responses.
  • Assessment of microinfarction and microvascular obstruction.
  • Evaluation of clinical outcomes in patients with microvascular obstruction.

Main Results:

  • Coronary microembolization causes physical obstruction, vasoconstriction, and inflammation, leading to microinfarction.
  • Microvascular obstruction post-myocardial infarction is linked to worse prognosis.
  • Subclinical microembolization can cause angina without epicardial obstruction.
  • Repetitive microembolization can lead to progressive cardiomyocyte loss and heart failure.

Conclusions:

  • Coronary microembolization is a significant contributor to myocardial injury and adverse outcomes.
  • Effective cardioprotective strategies to prevent microembolization and microvascular obstruction are currently lacking.
  • Further research is needed to develop clinical interventions to mitigate the effects of coronary microembolization.