[Pheochromocytoma with hemorrhagic necrosis and rupture with symptoms of acute abdomen and shock].

A case of a pheochromocytoma with haemorrhagic necrosis resulting in signs of acute abdomen with shock is reported. Diagnosis of a ruptured adrenal tumor was made by CT scanning. Elevated urine and plasma catecholamines as well as histological examination of the removed tumor confirmed the clinical suspicion of pheochromocytoma.

[Effects of 4-hour erect posture and furosemide on the blood level of atrial natriuretic peptide in patients with primary arterial hypertension].

The arterial pressure, the pulse frequency, the concentration of arterial natriuretic peptide (ANP), the aldosterone++ concentration and the plasma renin activity were determined in patients with primary hypertension after administration of furosemide in conditions of active assuming of erect position. The ANP concentration was lowered in that conditions both in the patients and in healthy subjects.

[Correlations of atrial natriuretic peptide and catecholamine levels in the blood during surgical removal of pheochromocytoma].

Atrial natriuretic peptide concentrations (ANP) were determined in 4 patients with pheochromocytoma during its surgical removal. There was no correlation among ANP level, plasma catecholamines concentrations and blood pressure. Increase of plasma ANP concentration after tumor removal can be explained by simultaneously observed hypervolemia.

[Atrial natriuretic peptide in patients with primary arterial hypertension].

Atrial natriuretic peptide (ANP) activity was studied in 33 males with borderline and established essential hypertension. No significant differences of serum ANP concentration were stated in patients with borderline and established uncomplicated hypertension in comparison with the control group.