Overview
Left atrioventricular valve atresia involves the absence or severe obstruction of the left atrioventricular valve, necessitating alternative pathways for adequate blood flow between the atria and ventricles to ensure survival 1.Diagnosis
Echocardiography essential for confirming diagnosis and assessing interatrial communication 1.
Catheterization may be required for detailed hemodynamic assessment 1.
Presence of a persistent left superior vena cava can indicate coronary sinus-left atrial window as a shunt pathway 2.Management
Interatrial Communication Procedures:
- Balloon atrial septostomy generally inadequate for long-term palliation 1.
- Blade atrial septostomy may provide adequate short-term relief with gradients ≤3 mm Hg, but long-term efficacy varies 1.
- Surgical septectomy recommended as first-line; however, 17.5% may fail due to restenosis 1.
Monitoring:
- Serial echocardiograms and catheterizations crucial for detecting restenosis post-procedure 1.Special Populations
Pediatrics: Primary focus of interventions due to congenital nature 12.
Comorbidities: Persistent left superior vena cava may complicate shunt management 2.Key Recommendations
Use surgical septectomy as the primary method for creating interatrial communication in left atrioventricular valve atresia, with close monitoring for restenosis 1 (Evidence: Strong).
Blade atrial septostomy can be considered for short-term palliation but should be followed by surgical intervention if inadequate 1 (Evidence: Moderate).
Regular echocardiographic and catheterization assessments are necessary to detect and manage restenosis post-procedural interventions 1 (Evidence: Moderate).References
1 Perry SB, Lang P, Keane JF, Jonas RA, Sanders SP, Lock JE. Creation and maintenance of an adequate interatrial communication in left atrioventricular valve atresia or stenosis. The American journal of cardiology 1986. link90288-2)
2 Nath PH, Delaney DJ, Zollikofer C, Ben-Sachar G, Castaneda-Zuniga W, Formanek A et al.. Coronary sinus-left atrial window. Radiology 1980. link