D J Penny1, A N Redington. 1. Department of Paediatric Cardiology, Royal Brompton National Heart and Lung Hospital, London.
Abstract
OBJECTIVE: To document whether the act of respiration influences pulmonary blood flow in patients after the Fontan operation. DESIGN: Prospective study in which patients acted as their own controls. SETTING: Supraregional paediatric cardiology centre. PATIENTS: Sixteen patients who had undergone atriopulmonary anastomosis (Fontan operation) for the treatment of congenital heart disease. INTERVENTION: Doppler assessment of pulmonary artery flow patterns with a simultaneous respirometer, electrocardiogram and phonocardiogram. RESULTS: Total (mean (1SD) ) forward pulmonary flow was 63.6 (35)% higher during inspiratory cardiac cycles than during expiratory ones. CONCLUSIONS: The act of breathing provides an additional energy supply to pulmonary blood flow in patients after the Fontan operation.
OBJECTIVE: To document whether the act of respiration influences pulmonary blood flow in patients after the Fontan operation. DESIGN: Prospective study in which patients acted as their own controls. SETTING: Supraregional paediatric cardiology centre. PATIENTS: Sixteen patients who had undergone atriopulmonary anastomosis (Fontan operation) for the treatment of congenital heart disease. INTERVENTION: Doppler assessment of pulmonary artery flow patterns with a simultaneous respirometer, electrocardiogram and phonocardiogram. RESULTS: Total (mean (1SD) ) forward pulmonary flow was 63.6 (35)% higher during inspiratory cardiac cycles than during expiratory ones. CONCLUSIONS: The act of breathing provides an additional energy supply to pulmonary blood flow in patients after the Fontan operation.
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