Anomalous left coronary artery (ALCA) is a rare heart defect.
Normally, the left coronary artery carries oxygenated blood to the heart muscle. The oxygenated blood comes from the aorta.
With ALCA, the left coronary artery is not connected to the aorta. Instead, it is connected to the pulmonary artery. This means that the blood does not have enough oxygen in it from the lungs. With this defect, the heart muscles receive blood that is low in oxygen. The blood also leaks back into the pulmonary artery because of the low pressure in this artery.
The Coronary Arteries
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ALCA may be detected in newborns. In some cases, it may not be detected until the baby is aged 2-6 months. Rarely, it is diagnosed in older children.
ALCA is a congenital defect. This means that the baby is born with it. It is not known exactly why some babies’ left coronary artery develops abnormally.
Symptoms may include:
Your child’s doctor may also detect a heart murmur during a physical exam.
This condition can lead to heart failure . If your child has any of these symptoms, get medical care right away.
The doctor will ask about your child’s symptoms and medical history. A physical exam will be done. Tests may include:
Talk with the doctor about the best treatment plan for your child. Treatment options include:
Surgery is usually needed to correct this defect. During surgery, the left coronary artery is:
Your child will need to have regular exams from a heart specialist. If your child has symptoms after surgery, the doctor may recommend:
American Family Physician
American Heart Association
Canadian Cardiovascular Society
Heart and Stroke Foundation of Canada
Cove Point Foundation. Anomalous left coronary artery. Cove Point Foundation, Johns Hopkins University website. Available at: http://www.pted.org/?id=anomalouscoronary1 . Accessed July 12, 2010.
Mayo Clinic. Atrioventricular canal defect. Mayo Clinic website. Available at: http://www.mayoclinic.com/health/atrioventricular-canal-defect/DS00745/DSECTION=risk-factors . Accessed July 7, 2010.
University of Michigan, CS Mott Children’s Hospital. Congenital heart defects: anomalous left coronary artery. University of Michigan, CS Mott Children’s Hospital website. Available at: http://www.med.umich.edu/mott/chc/patient_con_alca.html . Updated January 2010. Accessed July 12, 2010.
Last reviewed June 2013 by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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