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.
At times, it may be difficult to distinguish pericardial pain from the pain that occurs with a heart attack. Chronic pericarditis is usually associated with chronic inflammation and may result in fluid around the heart (pericardial effusion).