Master1 believes that the adoption of the term "coronary failure" to designate acute coronary seizures would lead to ambiguity and confusion. He would retain both terms "coronary occlusion" and "coronary insufficiency," since each represents an entity more or less readily distinguishable by the mode of onset, the symptoms and the characteristic electrocardiographic alteration. Coronary artery occlusion means sudden, complete obstruction of a coronary artery characterized clinically by an attack of severe and prolonged substernal pain, shock, impairment of the first heart sound, gallop rhythm, occasionally a pericardial rub, a fall in blood pressure, fever, leukocytosis and a rapid sedimentation rate. Acute coronary insufficiency indicates necrosis or infarction of the myocardium without complete closure of a coronary artery. Pain and necrosis or infarction of the myocardium may be produced by severe or prolonged diminution in the coronary flow in the absence of coronary occlusion.
The major difference between coronary occlusion