“…While these eleven cases and our three suggest that a causal relationship may exist between these two findings, thisoccurrenceisobviously not consistent since most patients with congenital PST or AF, äs noted above, were not reported to be edematous. PST and AF have frequently been demonstrated in utero with fetal electrocardiography [11,19,12,22] with the infant having neither distress nor evidence of edema in the neonatal period. Why some infants develop hydrops while others do not is perplexing.…”