[Diabetes mellitus and arterial hypertension. In search of the connecting link].

Late diabetic effects are the sequelae of for a long time super elevated blood sugar levels. The diabetic nephropathy is the cause of the secondary arterial hypertension. The investigation seeks for the connections between the diabetes mellitus and the essential, that is primary hypertension. The two diseases frequently appear and clearly increase in the second half of life. Moreover, they are above average frequently associated with each other. Among brothers and sisters of diabetic hypertensives in comparison to normal cohorts clearly increased high blood pressure prevalences were found. The insulin resistance which could be proved in a great number of hypertensive and which has been known since more than two decades might be the connecting link between hypertension and diabetes mellitus. Like the obesity the essential hypertension can be associated with all degrees of an insulin hyposensitiveness. The sodium-retaining effect of the insulin might explain the increased sodium content of the body in hypertensives. The differential diagnostics of the essential hypertension should therefore seek for conditions of an insulin resistance. The type II diabetic lacks a release of bradykinin during muscle work. Thus the glucose uptake into the cell is unfavourable influenced and demands an increased insulin excretion. This genetically (?) fixed defect is found also in essential hypertensives. It could be the connecting link between the two diseases. ACE-inhibitors have via a kininase II inhibition an effect also on the bradykinin decomposition and can favourable influence the glucose uptake into the muscle. An improved insulin effect among the ACE-inhibitors was described. Therefore, they should be preferred in the treatment of hypertensive diabetics.