Persistent left superior vena cava (PLSVC) connected to the left atrium

Area of Science:

• Cardiology
• Congenital heart defects
• Medical imaging

Background:

• A persistent left superior vena cava (PLSVC) is a rare congenital anomaly where the left superior vena cava drains into the left atrium instead of the right atrium.
• It is often asymptomatic and discovered incidentally during diagnostic procedures for other cardiac conditions.
• Sinus venosus atrial septal defects (VSDs) are another type of congenital heart defect, often associated with anomalies of the superior vena cava.

Observation:

• This case report details the diagnosis of PLSVC in an adult patient undergoing surgical correction for a large, inferiorly located sinus venosus atrial septal defect.
• The PLSVC was identified as a significant anatomical variation requiring consideration during the surgical planning and execution.
• Echocardiography was instrumental in the precise detection and characterization of the PLSVC and its drainage into the left atrium.

Findings:

• The study highlights the incidental diagnosis of a persistent left superior vena cava in an adult patient with a sinus venosus atrial septal defect.
• While typically asymptomatic, the presence of PLSVC can lead to technical difficulties and clinical challenges during cardiac surgery.
• Echocardiography confirmed the anomalous drainage of the PLSVC into the left atrium, a critical finding for surgical management.

Implications:

• Anesthesiologists and cardiac surgeons must be aware of the potential for PLSVC, especially in patients with associated cardiac anomalies like atrial septal defects.
• Recognition of PLSVC is vital to prevent intraoperative complications and ensure appropriate surgical correction.
• Echocardiography serves as a key diagnostic tool for identifying PLSVC, aiding in preoperative assessment and surgical planning for complex congenital heart disease.