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Coronary Circulation

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...

Physiology of the Heart: The Cardiac Cycle

Physiology of the Heart: The Cardiac Cycle

The cardiac cycle describes the events from one heartbeat to the next. It includes three main phases: diastole, atrial systole, and ventricular systole, all driven by changes in chamber pressures and the function of heart valves.
Diastole: The Relaxation Phase
During diastole, all four heart chambers relax. The atrioventricular (AV) valves open, and the semilunar valves close. This phase sees the lowest chamber pressures, promoting ventricular filling. Venous blood enters the heart through the...

Overview of Systemic Arteries

Overview of Systemic Arteries

The human body is a complex, well-organized machine, and at the heart of its operations lies the circulatory system. This network of blood vessels, which includes systemic arteries, plays a vital role in maintaining life by transporting nutrients, oxygen, and waste products to and from cells throughout the body.
Systemic circulation is the part of the cardiovascular system that carries oxygenated blood away from the heart to the body's tissues and returns deoxygenated blood back to the heart.

Coronary Artery Disease II: Pathophysiology

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...

Coronary Artery Disease V: Interprofessional Care

Coronary Artery Disease V: Interprofessional Care

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...

Anatomy of the Circulatory System

Anatomy of the Circulatory System

The human circulatory system consists of blood, blood vessels that carry blood away from the heart, around the body, and back to the heart, and the heart itself, which acts as a central pump. The systemic circuit supplies blood to the whole body, the coronary circuit supplies blood to the heart, and the pulmonary circuit supplies blood flow between the heart and lungs.

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Updated: Jun 5, 2026

Coronary Angiography During Ex-Situ Heart Perfusion in a Porcine Model

Coronary Angiography During Ex-Situ Heart Perfusion in a Porcine Model

Published on: July 12, 2024

[Coronary collateral circulation].

Turgay Celik¹, Murat Celik, Atila Iyisoy

¹Gülhane Askeri Tıp Akademisi Kardiyoloji Anabilim Dalı, Ankara, Turkey.

Turk Kardiyoloji Dernegi Arsivi : Turk Kardiyoloji Derneginin Yayin Organidir

|January 6, 2011

Summary

This summary is machine-generated.

Coronary collateral circulation, vital for heart health, develops in severe coronary artery disease but its variability remains unexplained. Further research is needed to identify factors influencing its development and patient outcomes.

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Direct Re-implantation of Left Coronary Artery into the Aorta in Adults with Anomalous Origin of Left Coronary Artery from the Pulmonary Artery (ALCAPA)

Direct Re-implantation of Left Coronary Artery into the Aorta in Adults with Anomalous Origin of Left Coronary Artery from the Pulmonary Artery (ALCAPA)

Published on: April 24, 2017

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Last Updated: Jun 5, 2026

Coronary Angiography During Ex-Situ Heart Perfusion in a Porcine Model

Coronary Angiography During Ex-Situ Heart Perfusion in a Porcine Model

Published on: July 12, 2024

Direct Re-implantation of Left Coronary Artery into the Aorta in Adults with Anomalous Origin of Left Coronary Artery from the Pulmonary Artery (ALCAPA)

Direct Re-implantation of Left Coronary Artery into the Aorta in Adults with Anomalous Origin of Left Coronary Artery from the Pulmonary Artery (ALCAPA)

Published on: April 24, 2017

Area of Science:

Cardiovascular Science
Vascular Biology
Cardiac Anatomy

Context:

The heart possesses a network of small vascular structures connecting coronary arteries, forming the basis of coronary collateral circulation.
These vessels, precursors to collateral circulation, are typically too small to be visualized via coronary angiography in normal or mildly occluded arteries.
Their presence and development are primarily observed in postmortem studies.

Purpose:

To investigate the factors influencing the development of coronary collateral circulation in patients with coronary artery disease.
To understand the significant inter-patient variability in coronary collateral circulation despite similar degrees of coronary artery disease.
To elucidate the reasons behind differential patient symptomatology and tissue resistance to ischemia.

Summary:

Coronary collateral circulation, a network of small vessels connecting coronary arteries, enhances myocardial resistance to ischemia.
While it develops in response to severe coronary artery disease, its extent varies significantly among patients.
The underlying factors driving these differences and their clinical implications are not fully understood.

Impact:

Understanding coronary collateral circulation variability can lead to personalized treatment strategies for coronary artery disease.
Identifying factors influencing collateral development may reveal new therapeutic targets to improve cardiac resilience.
This research could enhance risk stratification and management of ischemic heart disease.