A note on the epidemiology of acardiac monsters

Abstract

The literature on acardiac monsters has been reviewed. The following conclusions were drawn: 1. The probability of their appearance seems considerably higher among monoamniotic than diamniotic monochorionic twin pairs. 2. They seem more likely to occur within monozygotic (MZ) pairs in higher multiple births than in MZ twins. 3. The data are consistent with the suggestion that there is a slight female excess among them.

Malformações Fetais em Gestação Múltipla

“…Estima-se que o gêmeo acárdico ocorra aproximadamente em 1 para cada 30.000 a 35.000 partos 18,19 . Há evidência de que o risco de acardia é consideravelmente alto em gestação monoamniótica 20 . As teorias sobre o mecanismo pelo qual se desenvolve a acardia são: falha no desenvolvimento cardíaco primário ou o coração estava presente mas sofreu atrofia, como resultado de perfusão passiva e circulação reversa (TRAP sequence-seqüência da perfusão arterial reversa em gêmeos).…”

Twin: A Friend or a Foe!

“…Twin reversed arterial perfusion (TRAP) syndrome is a very rare condition that occurs in monochorionic twin pregnancies, resulting in coexistence of a normal ''pump'' twin and an ''acardiac'' twin resulting in high-output cardiac dysfunction in the pump twin [1]. It affects 1 % of monozygotic twins or 1 in 35,000 births [2].…”

Acardiac Acephalus Twin diagnosed at delivery: A case report

“…Twin-Reversed Arterial Perfusion (TRAP) Sequence or Acardiac twin is a rare condition complicating about 1% of monochorionic twins pregnancies and 1 out of 35000 deliveries [1]. Multifetal pregnancy is an obstetric condition that present high risks both for the mother and the fetuses.…”