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[Hypertensive pulmonary vascular disease in complete transposition of the great arteries (author's transl)]
Insights
Pulmonary vascular disease in complete transposition of the great arteries (TGA) can occur with or without increased pulmonary flow, driven by factors beyond volume overload. Early surgery is crucial to prevent damage.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Pulmonary Hypertension
Background:
- Complete transposition of the great arteries (TGA) presents significant challenges, including pulmonary vascular disease and heart failure.
- Increased pulmonary flow is a known risk factor, but pulmonary vascular disease also affects patients without this condition.
Observation:
- Hypertensive pulmonary vascular disease was noted in 3.6% of TGA patients with increased pulmonary flow and 3.3% without.
- Pulmonary vascular disease progression was observed even with an intact ventricular septum or pulmonic stenosis.
- The observed pulmonary lesions suggest causes beyond chronic severe volume overload.
Findings:
- Clinically unrecognized pulmonary microthrombi contribute to pulmonary vascular disease development in TGA.
- Cyanosis and its complications are significant factors in pulmonary vascular changes, alongside increased pulmonary flow.
- Pulmonary vascular damage can occur progressively in TGA patients.
Implications:
- Early corrective surgery (after 3 months) is recommended to prevent progressive pulmonary vascular damage.
- Timely surgical intervention may also mitigate other thrombo-embolic accidents in TGA patients.
- Understanding these multifactorial causes is key to improving TGA management and outcomes.
Abstract:
Pulmonary vascular disease and heart failure are the two major problems in complete transposition of the great arteries (TGA) with increased pulmonary flow. Hypertensive pulmonary vascular disease was observed in patients with complete TGA and increased flow (3.6%) as well as in those without increased pulmonary flow (3.3%). An intact ventricular septum or pulmonic stenosis did not appear to prevent the occurrence of progressive pulmonary vascular disease in all patients. The pulmonary lesion observed in these subjects cannot be explained by chronic severe volume overload alone. Clinically unrecognized pulmonary microthrombi are an additional cause for the development of pulmonary vascular disease in patients with complete TGA. Therefore cyanosis and its complications can be a major factor beside increased pulmonary flow in causing pulmonary vascular changes. Early corrective surgery performed after the age of 3 months is the therapy of choice to avoid progressive pulmonary vascular damage and other thrombo-embolic accidents.