Anomalous left coronary artery from the pulmonary artery (ALCAPA) is a rare heart defect.
Normally, the left coronary artery carries oxygen-rich blood to the heart muscle. The oxygenated blood comes from the aorta.
With ALCAPA, 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 get blood that is low in oxygen. The blood also leaks back into the pulmonary artery because of the low pressure in it.
Anomalous coronary arteries. EBSCO DynaMed website. Available at: https://www.dynamed.com/condition/anomalous-coronary-arteries. Accessed March 10, 2021.
Anomalous left coronary artery. Cove Point Foundation, Johns Hopkins University website. Available at: http://www.pted.org/?id=anomalouscoronary1. Accessed March 10, 2021.
Anomalous left coronary artery from the pulmonary artery (ALCAPA). Boston Children's Hospital website. Available at: http://www.childrenshospital.org/health-topics/conditions/anomalous-left-coronary-artery-from-the-pulmonary-artery-alcapa. Accessed March 10, 2021.
Anomalous left coronary artery from the pulmonary artery (ALCAPA). The Children's Hospital of Philadelphia website. Available at: http://www.chop.edu/service/cardiac-center/heart-conditions/anomalous-left-coronary-artery-from-pulmonary-artery.html. Accessed March 10, 2021.
Villa AD, Sammut E, et al. Coronary artery anomalies overview: The normal and the abnormal. World J Radiol. 2016 Jun 28;8(6):537-555.
Last reviewed December 2020 by
EBSCO Medical Review Board
Kari Kassir, MD
Last Updated: 3/10/2021
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