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Tests and diagnosis
By Mayo Clinic staff
Before birth
Because of advances in ultrasound technology, it's possible for a baby to be diagnosed with tricuspid atresia before he or she is born. Doctors can identify the condition on a routine ultrasound exam during pregnancy.
After birth
After your baby is born, his or her doctor may suspect a heart defect, such as tricuspid atresia, if your baby has a blue cast to his or her skin or is having trouble breathing. Your baby's doctor may also suspect a heart defect if he or she hears a heart murmur — an abnormal whooshing sound caused by turbulent blood flow.
Doctors typically use an echocardiogram to diagnose tricuspid atresia. This test uses high-pitched sound waves that bounce off your baby's heart to produce moving images your baby's doctor can view on a video screen.
In a baby with tricuspid atresia, the echocardiogram reveals the absence of a tricuspid valve and a smaller than normal right ventricle. Because this test tracks blood flow, it can also measure the amount of blood moving through holes in the walls between the right and left sides of the heart. In addition, an echocardiogram can identify associated heart defects, such as an atrial septal defect or a ventricular septal defect.
- Sondheimer HM, et al. Cardiovascular diseases. In: Hay WW Jr, et al. Current Diagnosis and Treatment: Pediatrics. 19th ed. New York, N.Y.: McGraw Hill; 2009. http://www.accessmedicine.com/content.aspx?aID=3402846. Accessed April 28, 2010.
- Single-ventricle defects. American Heart Association. http://www.americanheart.org/print_presenter.jhtml?identifier=11072. Accessed April 28, 2010.
- Harris IS, et al. Congenital heart disease in adults. In: Crawford MH. Current Diagnosis & Treatment: Cardiology. 3rd ed. New York, N.Y.: McGraw Hill; 2009 http://www.accessmedicine.com/content.aspx?aID=3649722. Accessed April 28, 2010.
- Keane JF, et al. Tricuspid atresia: Clinical manifestations. In: Keane JF, et al. Nadas' Pediatric Cardiology. Philadelphia, Pa.: Elsevier; 2006. http://www.mdconsult.com/book/player/book.do?method=display&type=bookPage&decorator=header&eid=4-u1.0-B978-1-4160-2390-6..50050-7--cesec5&uniq=198820213&isbn=978-1-4160-2390-6&sid=991370226. Accessed April 30, 2010.
- Congenital heart defects. March of Dimes. http://www.marchofdimes.com/professionals/14332_1212.asp. Accessed April 28, 2010.
- Tricuspid atresia. The Merck Manuals: The Merck Manual for Healthcare Professionals. http://www.merck.com/mmpe/print/sec19/ch287/ch287i.html. Accessed April 28, 2010.
- Sittiwangkul R, et al. Outcomes of tricuspid atresia in the Fontan era. Annals of Thoracic Surgery. 2004;77:889.
- Berg C, et al. Prenatal diagnosis of tricuspid atresia: Intrauterine course and outcome. Ultrasound in Obstetrics and Gynecology. 2010;35:183.
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