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The coronary collaterals: their development, morphology, function, and classification
Insights
Coronary collaterals, crucial for bypass surgery, preserve heart function by limiting myocardial infarction. Understanding these vessels enhances patient evaluation for surgical interventions.
Area of Science:
- Cardiovascular Science
- Medical Physiology
Background:
- Coronary collaterals play a vital role in maintaining myocardial function.
- Their significance is particularly noted in the context of coronary artery disease and bypass surgery evaluations.
Purpose of the Study:
- To define coronary collaterals and explain their development and function in the normal heart.
- To present a model of coronary collateral types, focusing on intracoronary and intercoronary anastomoses.
- To discuss the controversial role of collateral function in coronary artery disease using recent in vivo studies.
Main Methods:
- Review and synthesis of existing literature on coronary collaterals.
- Presentation of a conceptual model for classifying collateral types.
- Analysis of recent angiographic in vivo studies.
Main Results:
- Coronary collaterals, including intracoronary and intercoronary anastomoses, are defined and modeled.
- Evidence suggests collaterals can limit myocardial infarction size and preserve myocardial function.
- Collateral assessment aids in evaluating runoff and function for bypass surgery candidates.
Conclusions:
- Coronary collaterals are significant in preserving myocardial function and limiting infarct size.
- Further research into collaterals will deepen our understanding of their clinical importance.
- Collateral evaluation is essential for optimizing outcomes in patients considered for bypass surgery.
Abstract:
Coronary collaterals are important in evaluations made for bypass coronary artery surgery because of their role in the preservation of myocardial function. This paper attempts to define collaterals, explain how they develop, and describe what role they play in the normal heart. It presents a model of the different types of coronary collaterals, emphasizing the intracoronary and intercoronary anastomoses. The controversial role of the function of collaterals in coronary artery disease is discussed extensively, with special attention given to more recent angiographic in vivo studies. Recent investigations indicate that collaterals may limit the size of myocardial infarction as they help to preserve myocardial functions; they assist in the evaluation of both runoff and function for patients being considered for bypass surgery. As more is learned about collaterals, undoubtedly we shall gain a greater appreciation of their significance.