Tachycardia - The rapid beating of the heart. A term used to indicate a rate over 100 beats per minute.
 
Tachyrhythmia - A disturbance of the heart’s rhythm, regular or irregular, resulting in a rate over 100 beats per minute.
 
Thrombosis - The formation, development or presence of a thrombus.
 
Thrombus - An aggregation of blood elements, primarily platelets and fibrin with entrapment of red blood cells, frequently is causing vascular obstruction at the point of its formation.
 
Tricuspid Valve - This heart valve, named for its three cusps (leaflets), divides the right atrium and the right ventricle. On closing, the tricuspid prohibits the backflow of blood into the right atrium.
 
Type A Personality - Persons with aggressive and assertive behavior patterns aimed at high achievement and perfection. These persons are highly focused on goals and overly concerned with their own and others’ judgment of their behavior. Although scientific studies are yet to be conclusive about the correlation of Type A personalities and coronary artery disease, generally the two are considered being related.