Saturday, July 6, 2013

Heart Embryology

Focus in this MindMap the relation between "TBP PS" & "AST TCR" mnemonics:
  • Truncus arteriosus origins Ascending aorta and pulmonary trunk.
  • Bulbus cordis origins Smooth parts.
  • Primitive ventricle origins Trabeculade ventricles.
  • Primitive atrium origins Trabeculade atrials. 
  • Sinus venosus has 2 horns: left origins Coronary sinus and right Right atrium smooth part.


  1. Q: A 3-month-old boy who was born at full term presents to the pediatrician for evaluation of his congenital heart condition. His 39-year-old mother is healthy. Records show that prenatal screening was notable for a decreased level of α-fetoprotein and an increased level of β-human chorionic gonadotropin. The boy has flat facies, prominent epicanthal folds, and a simian crease on each hand. This child most likely has a heart condition that involves tissue derived from which embryological structure?

    A: Primitive atrium - ASD.

  2. A: An echocardiogram shows a mass arising from the smooth part of the atrium. This region of the atrium derive of what embryological structure?

    Q: Sinus venosus - Right horn