Atrioventricular canal defect can involve only the two upper chambers of the heart (partial) or all four chambers (complete). In either type, extra blood circulates in the lungs.
Complete atrioventricular canal defect
Signs and symptoms usually develop in the first several weeks of life. These signs and symptoms are generally similar to those associated with heart failure and might include:
- Difficulty breathing or rapid breathing
- Lack of appetite
- Poor weight gain
- Pale skin color
- Bluish discoloration of the lips and skin
- Excessive sweating
- Irregular or rapid heartbeat
- Swelling in the legs, ankles and feet
Partial atrioventricular canal defect
Signs and symptoms might not appear until early adulthood and might be related to complications that develop as a result of the defect. These signs and symptoms can include:
- Abnormal heartbeat (arrhythmia)
- Shortness of breath
- High blood pressure in the lungs (pulmonary hypertension)
- Heart valve problems
- Heart failure
When to see a doctor
See your doctor if you or your child develops signs or symptoms of atrioventricular canal defect.
Aug. 14, 2015
- Fleishman CE, et al. Clinical manifestations, pathophysiology, and diagnosis of atrioventricular (AV) canal defects. http://www.uptodate.com/home. Accessed June 3, 2015.
- Bonow RO, et al. Congenital heart disease. In: Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 10th ed. Philadelphia, Pa.: Saunders Elsevier; 201t. http://www.clinicalkey.com. Accessed June 3, 2015.
- Fleishman CE, et al. Management and outcome of atrioventricular (AV) canal defects. http://www.uptodate.com/home. Accessed June 3, 2015.
- What are holes in the heart? National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/holes. Accessed June 4, 2015.
- Martin RJ, et al. Genetic and environmental contributions to congenital heart disease. In: Fanaroff and Martin's Neonatal-Perinatal Medicine. 10th ed. Philadelphia, Pa.; Saunders Elsevier; 2015.
- AskMayoExpert. What other conditions are associated with ventricular septal defect (VSD)? Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2014.
- Backer CL. Modified single patch: Are we still worried about subaortic stenosis? Annals of Thoracic Surgery. 2015;99:1671.
- Creasy RK, et al. Fetal cardiac malformations and arrhythmias. In: Creasy and Resnik's Maternal-Fetal Medicine: Principles and Practice. 7th ed. Philadelphia, Pa.: Saunders Elsevier; 2014.
- The impact of congenital heart defects. http://www.heart.org/HEARTORG/Conditions/CongenitalHeartDefects/TheImpactofCongenitalHeartDefects/The-Impact-of-Congenital-Heart-Defects_UCM_001218_Article.jsp. American Heart Association. Accessed June 7, 2015.