Coronary microvascular dysfunction in childhood: An emerging pathological entity and its clinical implications

Area of Science:

• Cardiology
• Pediatric Cardiology
• Vascular Biology

Background:

• Coronary microvascular dysfunction (CMD) involves structural/functional changes in coronary microvasculature, impairing blood flow and causing ischemia.
• In adults, CMD is linked to chest pain, ischemic heart disease, and increased cardiovascular event risk, independent of atherosclerosis.
• CMD in children is underrecognized due to infrequent co-occurring coronary artery disease, leaving its presentation, mechanisms, and prognosis poorly understood.

Purpose of the Study:

• To review the varied presentations of coronary microvascular dysfunction reported in children.
• To delineate the emerging clinical significance of pediatric CMD.
• To explore the underlying mechanisms of impaired microcirculation in pediatric CMD.

Main Methods:

• This is a review article.
• It synthesizes existing literature on pediatric coronary microvascular dysfunction.
• It focuses on clinical presentations, mechanisms, and prognostic implications.

Main Results:

• CMD presents differently in children compared to adults, often without overt coronary artery disease.
• The clinical recognition of CMD in pediatric populations is limited.
• Emerging evidence suggests CMD has significant clinical implications in children.

Conclusions:

• Coronary microvascular dysfunction is an important, albeit underrecognized, condition in children.
• Further research is needed to understand its mechanisms, clinical presentation, and long-term impact.
• Recognizing pediatric CMD is crucial for timely diagnosis and management of cardiovascular health.