Possibly the chief conditions that may be confused with some of the results of arteriosclerosis are pseudo angina pectoris which may be mistaken for true angina pectoris, and ulcer of the stomach, appendicitis (?) or other inflammatory abdominal condition which may be mistaken for angina abdominalis. Differential tables are sometimes of value in fixing the chief points of difference graphically. =Pseudo angina pectoris=. Etiology rather certain; hysteria, neurasthenia, toxic agents, and reflex irritations. No age is exempt. Usually in young people, chiefly females. Paroxysms of pain occur spontaneously, are periodic and often nocturnal. Pain, while severe, is diffuse and sensation is of distension of heart. No sense of real anguish. Duration may be an hour or more. Restlessness and emotional symptoms of causative conditions are prominent. Usually no increase in arterial tension. Prognosis favorable. =True angina pectoris=. Etiology not certain but almost always associated with arteriosclerosis of the coronary arteries and also aortic regurgitation. Age is important factor. Rare before forty, and males usually affected. Paroxysms brought on by overexertions or excessive mental emotion. Rarely periodic. Intense pain, radiating down arm; heart felt as in a vise. Sense of anguish and impending dissolution. Duration from few seconds to several minutes. Silent and fixed attitude, rigidity rather than restlessness. Arterial tension is as a rule increased. Prognosis most unfavorable. In differentiating between ulcer of the stomach and angina abdominalis the following points may be of service: =Ulcer=. Occurs as a rule in young persons, more often females. Pain of boring character increased by food and by certain positions with food in stomach. Felt through to left of spine. Occult blood found in stools. Considerable anemia apt to be present. Arterial tension usually low. =Angina abdominalis=. Only occurs in adults over forty who have been heavy eaters and drinkers, mostly males. Pain cramp-like, diffuse, although more localized in epigastrium. Not necessarily any connection with food. No occult blood in stools. Anemia more often absent. Arterial tension high. (Splanchnic sclerosis.) =Diseases in Which Arteriosclerosis Is Commonly Found=