4 meanings of USMLE acronym and USMLE abbreviation. Get the Medical definition of USMLE by All Acronyms dictionary. Top Definition: United States Medical Licensing Exam In Medical dictionary category.
Pericarditis Definition. Inflammation of the lining around the heart (the pericardium) that causes chest pain and accumulation of fluid around the heart (pericardial effusion). There are many causes of pericarditis, including infections, injury, radiation treatment, and chronic diseases. SOURCE: MedTerms.
While it is unusual, a heart attack can also be caused by a spasm of a coronary artery. During a coronary spasm, the coronary arteries restrict or spasm on and off, reducing blood supply to the heart muscle (ischemia).ore than a million Americans have heart attacks each year. A heart attack, or myocardial infarction (MI), is permanent damage to the heart muscle. Myo means muscle, cardial refers to the heart, and infarction means death of tissue due to lack of blood supply.