Aortopulmonary Window with Crisscross Pulmonary Arteries: Anatomically Type 1, Physiologically Type 2

Area of Science:

• Pediatric Cardiology
• Congenital Heart Disease
• Vascular Anatomy

Background:

• Aortopulmonary window (APW) is a rare congenital heart defect characterized by an abnormal opening between the aorta and pulmonary artery.
• Congenital anomalies of the great arteries can lead to complex hemodynamic alterations.
• Understanding the interplay of associated defects is crucial for diagnosis and management.

Observation:

• A 6-month-old infant presented with a rare congenital anomaly: aortopulmonary window (APW).
• This case uniquely demonstrated an association with crisscross pulmonary arteries, a previously unreported finding.
• Differential pulmonary blood flow to the right pulmonary artery was evident on chest X-ray.

Findings:

• The co-occurrence of APW and crisscross pulmonary arteries presents a novel anatomical combination.
• The observed differential pulmonary blood flow is attributed to the complex hemodynamics arising from this combined anomaly.
• Pathophysiological mechanisms linking APW and crisscross pulmonary arteries to altered pulmonary perfusion are discussed.

Implications:

• This report expands the spectrum of known associations with aortopulmonary window.
• Recognition of this combined anomaly is important for accurate diagnosis and surgical planning in pediatric cardiac cases.
• Further research into the embryological basis and clinical significance of this association is warranted.