Benign - Not progressive, better known as not malignant or not aggressive.
 
Beta-blocker - A group of medications that act to block specific receptors in the nervous system. Beta-blockade slows the heart rate, reducing the blood pressure and anxiety. Beta-blockers are used in the treatment of angina, heart arrhythmias, high blood pressure, mitral valve prolapse and other conditions.
 
Blockage of an Artery - An obstruction in a coronary artery due to a clot or mass.
 
Blood - Considered a circulating tissue. Composed of a fluid portion (plasma) and suspended formed elements (red blood cells, white blood cells, platelets). Arterial blood transports oxygen and nutrients to the tissues. Venous blood transports carbon dioxide and metabolic products for excretion.
 
Blood Clot - The conversion of blood from a liquid form to a solid one through the process of coagulation. A thrombus is a clot, which forms inside a blood vessel. If the clot moves inside the vessel it is considered an embolus (embolism). The presence of atherosclerotic plaque lining blood vessel walls is a significant stimulus for clot formation.
 
Blood Pressure - The force of circulating blood on the walls of the arteries. This measurement is divided into systolic (pressure during contraction of the heart) and diastolic (pressure during relaxation phase). Blood pressure varies with age and sex of the individual. A rule of thumb for normal systolic pressure is 100 + age of individual. In children 2 x (age) + 80 = systolic. The diastolic pressure should be roughly 2/3 the systolic pressure.
 
Blood Vessel - All the vessels lined with a tissue called endothelium, through which blood circulates (arteries, arterioles, capillaries, venules, and veins).
 
Bradycardia - The slowness of the heartbeat, usually defined as a rate fewer than 60 beats per minute.