Normal and anomalous coronary arteries: definitions and classification.

Area of Science:

• Cardiovascular Science
• Developmental Biology
• Medical Anatomy

Background:

• Existing literature lacks a clear definition of normal coronary arteries.
• Understanding coronary artery anatomy, embryology, and pathophysiology is crucial.
• Variations and anomalies require precise classification.

Purpose of the Study:

• To propose a new definition of normal coronary arteries based on essential anatomical features.
• To introduce concepts of normal variants versus anomalies using statistical definitions.
• To organize the spectrum of coronary abnormalities into a comprehensive classification scheme.

Main Methods:

• Comprehensive literature survey on coronary artery anatomy, embryology, and pathophysiology.
• Analysis of embryogenesis data to establish a definition of normality.
• Statistical definition of the normal range (99% of presentations).

Main Results:

• A new definition of normal coronary arteries is proposed, focusing on essential anatomical features.
• Coronary anomalies are defined as patterns occurring in less than 1% of cases.
• A classification scheme for coronary abnormalities is presented, distinguishing anatomic from pathophysiologic anomalies.

Conclusions:

• A precise definition of normal coronary arteries is established, differentiating variants from anomalies.
• The proposed classification aids in understanding and clinical management of coronary abnormalities.
• A significant limitation is the paucity of experimental studies on coronary artery embryogenesis.