Which lab tests are performed in the workup of tetralogy of Fallot (TOF) in adults?

Updated: Nov 13, 2018
  • Author: Shabir Bhimji, MD, PhD; Chief Editor: Yasmine S Ali, MD, FACC, FACP, MSCI  more...
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In adult patients, the following laboratory studies may be helpful:

  • Complete blood cell count: A mild anemia may be present; polycythemia is rare in the absence of cyanosis.

  • Coagulation profile: May be abnormal in patients with cyanosis and bleeding

  • Arterial blood gas (including serum lactate, base excess, oxygen partial pressure [PO2]): The patient's oxygenation status, serum lactate levels, and base excess value appear to be prognostic markers for mortality in those undergoing surgical repair of tetralogy of Fallot. [4]

  • Blood cultures: Obtain blood cultures in febrile patients to rule out endocarditis or sepsis.

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