RELATIONS BETWEEN VASOACTIVE HORMONES AND DIASTOLIC FUNCTION IN HYPERTENSIVE UREMIC PATIENTS

Background. Arterial hypertension is a significant risk factor for the high rate of cardiovascular disease in chronic uraemic (CU) patients. Any role that hypertension may play in CU patient outcomes assumes ad ded significance. The elevation of some hormonal factors in early clin ical stage could represent a valuable marker of cardiac disease in CU. Aim. This study first investigated the role of several hormones on ca rdiac diastolic properties in CU patients. Moreover, the study investi gated the association of hypertension with bath diastolic function and release of vasoactive hormones in CU patients. Results. We have repor ted that the early impairment of diastolic function is correlated with the elevation of both circulating plasma atrial natriuretic factor an d endothelin-1 (ET-1) in hypertensive CU patients. Since the effect of ET-1 on diastolic function is still poorly understood, we have invest igated also this issue. In eight additional patients with reduced E/A ratio, but without uraemia, hypertension or chronic heart failure, we have showed a high inverse correlation between the values of E/A ratio and ET-1 plasma concentrations. Conclusions. These results strongly s uggest that the elevation in ET-1 levels was correlated with diastolic dysfunction in man. This phenomenon may have important pathophysiolog ical implications suggesting the possibility of an early therapeutic a pproach in these patients.