Pulmonary vascular volume index as a predictor of pulmonary vessel development in patients with tetralogy of Fallot

Abstract

Objective To explore the efficacy of pulmonary vascular index(PVVI)in predicting pulmonary vessel development in patients with tetralogy of Fallot(TOF).Methods Twenty five TOF patients' McGoon index and Nakata index were ealculated on the CTA three dimensional reconstructed films,and their pulmonary vascular volume index was calculated using 64-slice spiral CT assisted volume measurement system.The correlative analysis was performed to analyze the relationship between different indexes and clinical outcome.Results Nakata index was more correlated with the postoperative recovery compared with McGoon index.The length of stay in ICU,mechanical ventilation time,doses of positive inotropic drugs were found to be correlated with PVVI better than Nakata index.In children with total PVVI less than 120 cm3/m2,postoperative hemodynamic parameters were unstable and associated with low cardiac output syndrome and high mortality.Conclusions PVVI is promising in evaluating the pulmonary vessels development and predicting the clinical outcome. Key words: Tetralogy of fallot; Pulmonary vascular volume index(PVVI)