- 社団法人 日本腎臓学会
- 日本腎臓学会誌 (ISSN:03852385)
- vol.30, no.4, pp.347-353, 1988-04-25 (Released:2011-07-04)
The mechanism of polyuria associated with paroxysmal supraventicular tachycardia (SVT) was investigated in 8 patients whose SVT was provoked artificially by esophageal pacing. SVT was sustained for 60 minutes. Blood and urine samples were collected every 30 minutes from one hour before provocation to one hour after termination of SVT. Urine volume increasd in all patients more than two fold (on average 2.5 fold) of the control volume. Urine osmolality decreased from 546±66 (S. E.)mOsm/kg at the control period to 197±32 mOsm/kg at the peak of urine volume. Urinary Na excretion increased significantly (p<0.01) about 1.5 fold for 30 minutes after termination of SVT. Urinary antidiuretic hormone (u-ADH) was suppressed to one third of control period during SVT (from 30±11 pg/min to 8±2 pg/min), then increased significantly (p<0.05) to 74±15 pg/min after termination. Although plasma ADH level did not change during SVT, it tended to increased after termination. Plasma concentration of atrial natriuretic polypeptide (p-ANP) increased to 5 fold on average at termination of SVT and maximally attained value was 400 pg/ml. Urinary prostaglandin E2(u-PGE2) excretion increased after termination of SVT and percent changes of u-PGE2 had a positive correlation with those of urinary Na excretion (r=0.64, p<0.001, n=5). Positive correlation was also found between percent changes of u-PGE2 excretion and those of u-ADH excretion (r=0.72, p<0.001, n=5). The findings suggest the following conclusions: 1) The polyuria during SVT period was attributed mainly to the inhibition of ADH secretion, 2) Natriuresis after SVT period was due to i) the increase of p-ANP and ii) the release of renal PGE2 associated with the increased ADH secretion.