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Pulmonary artery abnormalities in tetralogy of Fallot and relation to late physical performance
H Jonsson1, H Wahlgren, T Ivert
1Department of Thoracic Surgery, Karolinska Hospital, Stockholm, Sweden.
Insights
Pulmonary artery abnormalities are common in tetralogy of Fallot repair patients but do not impact long-term physical performance. Post-repair pressure ratios improved over time in survivors.
Area of Science:
- Cardiology
- Pediatric Cardiac Surgery
- Congenital Heart Disease
Background:
- Tetralogy of Fallot is a complex congenital heart defect requiring surgical repair.
- Pulmonary artery abnormalities are frequently observed in patients with Tetralogy of Fallot.
- The long-term impact of these abnormalities on patient outcomes is not fully understood.
Purpose of the Study:
- To investigate the prevalence and impact of pulmonary artery abnormalities in patients undergoing intracardiac repair of Tetralogy of Fallot.
- To assess the relationship between pulmonary artery dimensions, post-repair hemodynamics, and long-term functional capacity.
Main Methods:
- Retrospective review of preoperative angiograms in 86 patients who underwent Tetralogy of Fallot repair.
- Analysis of pulmonary artery dimensions, including hypoplasia, stenosis, and atresia.
- Comparison of intraoperative post-repair right ventricular/left ventricular systolic pressure ratio (PRV/LV) with predicted values.
- Evaluation of long-term work capacity and pulmonary function in survivors.
Main Results:
- Pulmonary artery abnormalities were present in 67% of patients, with hypoplasia being common.
- Transannular patching was associated with smaller pulmonary arteries compared to those without patching.
- High post-repair PRV/LV ratios were linked to poorer prognosis, but these ratios decreased significantly over 13-26 years in survivors.
- No significant influence of pulmonary artery abnormalities on long-term work capacity or pulmonary function was found.
Conclusions:
- Pulmonary artery abnormalities are a frequent finding in Tetralogy of Fallot but do not independently affect long-term physical performance in survivors.
- Post-repair hemodynamic assessment and long-term monitoring are crucial for managing these patients.
Abstract:
Preoperative angiograms were reviewed in 86 (52%) of 165 patients who underwent intracardiac repair of tetralogy of Fallot in 1966-1976. The median age at repair was 7 years (range 9 months-55 years). Hypoplasia, stenosis or atresia of the pulmonary and aortopulmonary collateral arteries were present in 58 patients (67%). Hypoplasia of the main pulmonary artery was associated with hypoplasia of the pulmonary artery branches. In patients who received a transannular patch the pulmonary arteries were smaller than in those without patch. Three of five pulmonary artery branch stenoses were located at the site of a previous palliative shunt. The postrepair right ventricular/left ventricular systolic pressure ratio (PRV/LV) measured in the operating room was compared with a predicted ratio based on pulmonary artery dimensions. High PRV/LV was associated with poor prognosis. In survivors the postrepair PRV/LV had fallen significantly 13-26 years later. Work capacity and pulmonary function at follow-up were not influenced by presence of pulmonary artery abnormalities. We conclude that such abnormalities, although common in patients with tetralogy of Fallot, did not per se influence physical performance in long-term survivors.