I. Pericarditis
II. Myocarditis

rheumatic fever, rheumatoid arthritis, lupus erythematosus, and scleroderma; and trauma that is iatrogenic, postsur-gical, or caused by a catheter or pacemaker.

GLOSSARY
angina chest pain caused by temporary lack of blood to an area of heart muscle cells, usually caused by severe obstruction of the artery supplying blood to the segment of cells.
arrhythmia general term for irregularity or rapidity of the heartbeat, an abnormal heart rhythm.
heart failure failure of the heart to pump sufficient blood from the chambers into the aorta; inadequate supply of blood reaches organs and tissues.
hypotension marked decrease in blood pressure, usually less than 95 mmHg.
myocardial infarction death of an area of heart muscle due to blockage of a coronary artery by blood clot and atheroma; medical term for a heart attack or coronary thrombosis.
pericarditis inflammation of the pericardium or sac surround¬ing the heart; this is not a heart attack.
2. Drugs and Radiation
Pericarditis can be caused by cancer chemotherapeutic agents (daunorubicin), dantrolene, hydralazine, isoniazid, minoxidil, procainamide, phenytoin, and anticoagulants. Radiation to the chest may rarely cause pericarditis.

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• I. PERICARDITIS
  The pericardium is a double membrane that covers the heart and can be involved in infective and noninfective disorders (see Figure 2 in the chapter entitled Anatomy of the Heart and Circulation).
• II. MYOCARDITIS
  Acute myocarditis is a disorder that can cause a fulminant illness resulting in severe functional impairment or death. Myocarditis appears to be a precursor to dilated cardiomyopathy in some patients.
• BIBLIOGRAPHY
  Garcia, M. J. Constriction vs. Restriction: How to evaluate? J. Am. Coll.