[病例]男，42岁，农民。因心前区不适4月，伴双下肢水肿、麻木1月，于1996年6月18日入院。病人4月前无明显诱因感心前区持续性不适，伴恶心、纳差，饱食后加重，无腹痛、腹泻、呕吐等其它不适。1月前开始出现双下肢水肿、麻木，午后明显，偶有心悸、胸闷，无气促及胸痛。2周前 [Case] ​​Male, 42 years old, farmer. Due to precordial discomfort in April, with double lower extremity edema, numbness in January, on June 18, 1996 admitted. No obvious predisposition to patients 4 months ago, no sense of persistence in front of persistent discomfort, with nausea, anorexia, aggravated after eating, no abdominal pain, diarrhea, vomiting and other discomfort. A month ago began to appear double lower extremity edema, numbness, obvious afternoon, occasional heart palpitations, chest tightness, no shortness of breath and chest pain. 2 weeks ago