[Content of endogenous prostanoids in patients with paroxysmal supraventricular disorders of the heart rhythm].

Blood endogenous prostaglandins, E, F2 alpha, prostacyclin and thromboxane levels were measured in the ascending aorta and the coronary sinus of 32 patients (29 males and 3 females) with paroxysmal supraventricular arrhythmias (atrial fibrillation and supraventricular tachycardia) during the sinus rhythm and an arrhythmic paroxysm. Group 1 was made up by 22 patients with idiopathic cardiac rhythm disorders, and group 2 comprised 10 coronary patients with arrhythmias. A relationship was demonstrated between cardiac endogenous prostanoids balance and the clinical pattern of cardiac rhythm abnormality (duration and frequency of paroxysms) as well as changes in cardiac prostanoid rations associated with tachyarrhythmic paroxysms.