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  • Title: The association between pulmonary vascular disease and respiratory improvement in infants with type I severe bronchopulmonary dysplasia.
    Author: Carpenter RJ, Srdanovic N, Rychlik K, Sen SK, Porta NFM, Hamvas AE, Murthy K, Hauck AL.
    Journal: J Perinatol; 2022 Jun; 42(6):788-795. PubMed ID: 35397644.
    Abstract:
    OBJECTIVE: To describe the association between echocardiographic measures of pulmonary vascular disease and time to respiratory improvement among infants with Type I severe bronchopulmonary dysplasia (sBPD). STUDY DESIGN: We measured the pulmonary artery acceleration time indexed to the right ventricular ejection time (PAAT/RVET) and right ventricular free wall longitudinal strain (RVFWLS) at 34-41 weeks' postmenstrual age. Cox-proportional hazards models were used to estimate the relationship between the PAAT/RVET, RVFWLS, and the outcome: days from 36 weeks' postmenstrual age to room-air or discharge with oxygen (≤0.5 L/min). RESULT: For 102 infants, the mean PAAT/RVET and RVFWLS were 0.27 ± 0.06 and -22.63 ± 4.23%. An abnormal measurement was associated with an increased time to achieve the outcome (PAAT/RVET: 51v24, p < 0.0001; RVFWLS; 62v38, p = 0.0006). A normal PAAT/RVET was independently associated with a shorter time to outcome (aHR = 2.04, 1.11-3.76, p = 0.02). CONCLUSION: The PAAT/RVET may aid in anticipating timing of discharge in patients with type I severe BPD.
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