<unk> is a medical term generally referring to a constriction in the airway or, by extension, a restriction in blood flow. It may refer specifically to: *<unk> pectoris, chest pain due to ischemia (a lack of blood and hence oxygen supply) of the heart muscle<unk> animi, a subjective sense that one is dying, which may accompany cardiac ischemia or other conditions * Abdominal<unk>  postprandial abdominal pain that occurs in individuals with insufficient blood flow to meet visceral demands * Ludwig's<unk>  a serious, potentially life-threatening infection of the tissues of the floor of the mouth * Prinzmetal's<unk>  a syndrome typically consisting of cardiac chest pain at rest that occurs in cycles * Vincent's<unk>  infection of the tonsils caused by spirochaeta and treponema. Sometimes confused with necrotizing ulcerative gingivitis ("trench mouth") - infection of the gums leading to inflammation, bleeding, deep ulceration and necrotic gum tissue *<unk> tonsillaris, an inflammation of the tonsils *<unk> bullosa haemorrhagica, blood blisters in the mucous membranes of the mouth * Herpangina, pharyngeal blisters caused by Coxsackie A virus or Echovirus
Angina 
Chest pain
Carditis
Abdominal angina
Pericarditis
Arteritis
Unstable angina
Myocardial infarction