An abdominal aortic aneurysm, also called AAA or triple A, is a bulging, weakened area in the wall of the abdominal aorta (the largest artery in the body) resulting in an abnormal widening or ballooning greater than 50 percent of the vessel's normal diameter (width).
Achalasia is a rare disease of the muscle of the esophagus that occurs when the lower esophageal sphincter fails to open and let food pass into the stomach. As a result, patients with achalasia have difficulty swallowing food.
Acute vascular thrombosis occurs when a blood clot obstructs a vein. Blockages in these vessels can slow or even stop blood flow and cause serious consequences. Different types of vascular thrombosis occur in different parts of the body.
Angina (chest pain) indicates an underlying heart problem such as coronary heart disease, which is a result of one or more blockages in the coronary arteries. It also may signal coronary microvascular disease, which affects the heart’s smallest coronary arteries.
The aorta, the body's largest artery, delivers oxygenated blood to the rest of the body. The heart pumps blood out of the left ventricle, through the aortic valve, and into the aorta. Aneurysm is the primary problem that may affect the aorta; the blood vessel may become enlarged beyond its normal size.
Aortic valve regurgitation occurs when the aortic valve does not close tightly and blood leaks back into the heart's pumping chamber when the left ventricle relaxes.
Aortic valve stenosis is a buildup of calcium deposits on the heart valve, which obstructs blood flow because the narrowing of the valve prevents it from opening properly.
An irregular heartbeat is an arrhythmia. A normal heart rate is 50 to 100 beats per minute, but arrhythmias and abnormal heart rates don't necessarily occur together. Arrhythmia symptoms can occur with a normal heart rate, or with heart rates that are slow or rapid.
Coronary arteries are the blood vessels that supply blood directly to your heart muscle. Arterial blockage often can be diagnosed using a cardiac catheterization.
Atrial septal defect (ASD) is a common structural heart defect that can be present at birth (congenital). It is a hole in the septum (wall) that separates the two upper chambers (atria) of the heart.