Overview
Double inlet left ventricle (DILV) is a congenital heart defect characterized by both atrioventricular valves draining into the left ventricle, leading to systemic and pulmonary circulations that are not adequately separated 1.Diagnosis
Echocardiography is essential for confirming the anatomy and assessing ventricular function 1.
Cardiac MRI or CT angiography may provide additional detailed anatomical information 1.
Hemodynamic assessment through catheterization can be crucial for surgical planning 1.Management
Fontan Procedure: Recommended for definitive surgical correction 1.
- Operative mortality decreased from 21% (1974-1980) to 9% (1981-1989) with improved surgical techniques 1.
Postoperative management includes close monitoring for arrhythmias, heart failure, and complications like bleeding varices 1.Special Populations
Pediatrics: Early surgical intervention can significantly improve outcomes; median age at operation was 10 years in the study 1.
Comorbidities: Patients with additional comorbidities like severe pulmonary hypertension may have higher risks; tailored surgical approaches are necessary 1.Key Recommendations
Consider the Fontan procedure for properly selected patients with DILV to achieve a mortality risk of less than 10% 1 (Evidence: Strong).
Perform detailed preoperative imaging (echocardiography, MRI/CT angiography) to optimize surgical planning 1 (Evidence: Moderate).
Monitor for late complications including reoperation, myocardial failure, and arrhythmias post-Fontan procedure 1 (Evidence: Moderate).References
1 Mair DD, Hagler DJ, Julsrud PR, Puga FJ, Schaff HV, Danielson GK. Early and late results of the modified Fontan procedure for double-inlet left ventricle: the Mayo Clinic experience. Journal of the American College of Cardiology 1991. link90511-7)