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Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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Inseparable thoraco-omphalopagus twins

Mohamed A Hamdan1, Muzibunnisa Begam, Hisham M Mirghani

  • 1Department of Pediatrics, Tawam Hospital, Al Ain, United Arab Emirates. mhamdan@tawamhospital.ae

Pediatric Cardiology
|September 9, 2010
PubMed

Insights

Conjoined twins, particularly thoracopagus types, often share vital organs like the heart. Survival after separation hinges on the complexity of fused cardiac anatomy and conduction systems.

Area of Science:

  • Medical Science
  • Genetics
  • Surgical Innovation

Background:

  • Conjoined twins occur in 1 in 50,000 to 200,000 live births.
  • Thoracopagus and thoraco-omphalopagus twins constitute 75% of cases, frequently involving shared thoraxes and abdomens.
  • Cardiac and hepatic sharing are common in these twins.

Observation:

  • Antenatal diagnosis is crucial for assessing cardiac anatomy and determining surgical feasibility.
  • Thoracopagus twins commonly exhibit complex cardiac structures and share a pericardial sac.
  • The degree of fusion in cardiac chambers and conduction systems dictates separation outcomes.

Findings:

  • Survival is directly dependent on the extent of cardiac fusion.
  • When twins share atria, ventricles, or both, outcomes are often fatal, even with surgical intervention.
  • Successful separation is contingent upon the non-fusion of critical cardiac components.

Implications:

  • Accurate antenatal imaging and cardiac assessment are vital for surgical planning and parental counseling.
  • Understanding cardiac fusion patterns can guide therapeutic strategies for conjoined twins.
  • Research into surgical techniques for complex cardiac sharing in conjoined twins remains critical.

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