Medical ConditionsCardiac & respiratory: Dextro-transposition of the great arteries
Medical ConditionsCardiac & respiratory: Dextro-transposition of the great arteries
Dextro-transposition of the great arteries
Overview
Board takeaway: Determine repair type, residual disease, rhythm, and baseline oxygenation; neonatal repair does not replace lifelong cardiac follow-up.
What is dextro-transposition of the great arteries?
In d-TGA, the aorta leaves the right ventricle and the pulmonary artery leaves the left ventricle. Systemic and pulmonary circulations run in parallel. Survival before repair depends on mixing through atrial, ventricular, or ductal connections. This differs from congenitally corrected transposition.
Which presentation and treatments characterize d-TGA?
Severe neonatal cyanosis, rapid breathing, poor feeding, and inadequate oxygen delivery prompt emergency cardiac care. Prostaglandin therapy and sometimes balloon atrial septostomy support mixing before surgery. The arterial switch reconnects the great arteries to the appropriate ventricles; older patients may have an atrial baffle operation. Treatment improves survival but does not eliminate later cardiac concerns.
What oral findings can accompany d-TGA?
Chronic cyanosis, enamel-development disturbances, feeding-related caries exposures, and medication-related oral effects may occur. These depend on the child's history and present status. Prior intubation and airway injury may matter when anesthesia is planned.
How should dental care be planned after d-TGA repair?
Review cardiology follow-up, exercise tolerance, baseline saturation, ventricular function, residual defects, arrhythmias, and medication. Coordinate extensive treatment or anesthesia when disease is complex. Maintain prevention and timely infection treatment. Endocarditis prophylaxis depends on qualifying cyanotic disease, prosthetic material and repair timing, residual defects, or other high-risk indications; do not assume every repaired patient needs lifelong prophylaxis.
What determines long-term prognosis after d-TGA repair?
Many repaired patients have good function but require lifelong congenital cardiology care. Residual obstruction, coronary problems, ventricular dysfunction, rhythm disease, or baffle problems may occur depending on the repair. Current physiology determines dental risk more accurately than the original neonatal diagnosis alone.