In psychology, stress is a feeling of strain and pressure. Small amounts of stress may be desired, beneficial, and even healthy. Positive stress helps improve athletic performance. It also plays a factor in motivation, adaptation, and reaction to the environment. Excessive amounts of stress, however, may lead to bodily harm. Stress can increase the risk of strokes, heart attacks, ulcers, dwarfism, and mental illnesses such as depression.
Myocarditis is inflammation/infection of the heart muscle. Pericarditis is inflammation the pericardium which is the sac surrounding the heart. Endocarditis refers to an infection of the heart valves. Myocarditis is inflammation/infection of the heart muscle. Pericarditis is inflammation the pericardium which is the sac surrounding the heart. In brief: Different structures. Endocarditis refers to an infection of the heart valves.  Pericarditis is inflammation the pericardium which is the sac surrounding the heart. In brief: Different structures. Endocarditis refers to an infection of the heart valves.
The infections of the heart that result in myocarditis will be discussed in this handout. Just as viruses are the most common cause of pericarditis they are also the most common cause of myocardial infection (Table C-1). Endocarditis is an inflammation of the inner surface or endothelium of the heart.