Atrial fibrillation. A presentation of 2 cases

1. Kaluarachchi DC, Allen DB, Eickhoff JC, Dawe SJ, Baker MW. Increased congenital hypothyroidism detection in preterm infants with serial newborn screening. J Pediatr. 2018:31691--3, pii: S0022-3476. 2. Léger J, Olivieri A, Donaldson M, Torresani T, Krude H, van Vliet G, et al. European Society for Paediatric Endocrinology consensus guidelines on screening, diagnosis, and management of congenital hypothyroidism. J Clin Endocrinol Metab. 2014;99:363--84. 3. Woo HC, Lizarda A, Tucker R, Mitchel ML, Vohr B, Oh W, et al. Congenital hypothyroidism with a delayed thyroid stimulating hormone elevation in very premature infants: Incidence and growth and developmental outcomes. J Pediatr. 2011;158:538--42. 4. LaFranchi SH. Screening preterm infants for congenital hypothyroidism: better the second time around. J Pediatr. 2014;164:1259--61. 5. Kaluarachchi DC, Colaizy TT, Pesce LM, Tansey M, Klein JM. Congenital hypothyroidism with delayed thyroid-stimulating hormone elevation in premature infants born at less than 30 weeks gestation. J Perinatol. 2017;37:277--82. 6. Osborn DA, Hunt RW. Prophylactic postnatal thyroid hormones for prevention of morbidity and mortality in preterm infants. Cochrane Database Syst Rev. 2007. CD005948.