[Role of certain biochemical indicators in the pathogenesis of functional cardiopathy].

A study of a few biochemical parameters in 30 patients with functional cardiopathy (in comparison with 30 control persons) revealed significant differences in the indices of the acid-base balance, lactic acid concentration, and plasma electrolytes. These differences were noted both at rest and under physical exercises and hyperventilation tests, being even more evident during the above functional tests. A conducted comparison of physical endurance and increasing blood level of lactic acid revealed their reverse relationship. During the hyperventilation test, a relationship was noted between the amplitude of the T-wave of ECG and the reduction of the potassium plasma level. The revealed regularities may to some extent explain the origin of the symptoms observed in functional cardiopathy.