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[In Process Citation]

Kaku1

  • 1Servico de Cardiologia Pediatrica do Hospital de Santa Marta.

Revista Portuguesa De Cardiologia : Orgao Oficial Da Sociedade Portuguesa De Cardiologia = Portuguese Journal of Cardiology : an Official Journal of the Portuguese Society of Cardiology
|December 11, 1999
PubMed
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This study investigated coronary circulation in Transposition of the Major Arteries (TMA), finding larger coronary orifices and altered origins. Post-Jatene surgery, coronary arteries remained patent with preserved function, though ongoing follow-up is recommended.

Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Cardiac Surgery

Background:

  • Transposition of the Major Arteries (TMA) involves parallel systemic and pulmonary circulation, requiring communication for survival.
  • Jatene's operation is the preferred treatment for TMA, but long-term success hinges on coronary artery patency and left ventricular function.
  • Uncertainty regarding coronary artery growth and potential silent lesions necessitates detailed study of coronary circulation in TMA.

Purpose of the Study:

  • To analyze coronary artery anatomy and circulation in Transposition of the Major Arteries (TMA).
  • To evaluate coronary artery patency, myocardial function, and ischemia markers post-Jatene operation for TMA.
  • To establish optimal angiographic views for diagnosing coronary anatomy in TMA.

Main Methods:

Related Experiment Videos

  • Anatomic analysis of 130 heart specimens and a prospective angiographic study in 50 children with TMA.
  • Assessment of myocardial ischemia using Troponin-T (cTnT) in 54 children and myocardial function evaluation in 30 post-Jatene patients.
  • Myocardial perfusion scintigraphy, dobutamine stress echocardiography, and angiocardiography were used to assess coronary artery permeability and function.

Main Results:

  • TMA hearts frequently showed a right-anterior aorta (65%) and larger pulmonary than aortic orifices.
  • Coronary orifices were larger in TMA compared to normal hearts, with variations in coronary artery origins.
  • Postoperative angiograms revealed patent coronary arteries with no stenosis, and preserved myocardial perfusion for nearly three years; cTnT accurately assessed myocardial lesions.

Conclusions:

  • The study provides detailed morphologic and functional insights into coronary circulation in TMA and post-Jatene repair.
  • While coronary arteries remained patent and function preserved post-surgery, ongoing monitoring is advised due to rare ischemic changes.
  • Accurate pre-operative diagnosis of coronary anatomy using specific angiographic views is crucial for surgical planning.