Renal and hemodynamic effects of isradipine in essential hypertension.
Am J Med
; 86(4A): 60-4, 1989 Apr 17.
Article
em En
| MEDLINE
| ID: mdl-2523657
ABSTRACT
Twenty-three men with essential hypertension participated in a double-blind placebo-controlled study with a crossover design to evaluate the long-term (nine weeks) effects of isradipine on central and renal hemodynamics. Isradipine as monotherapy was titrated from 2.5 to 5 and then to 7.5 mg twice daily. At the end of the crossover periods, cardiac output (dye-dilution) and intraarterial blood pressure were assessed. Compared with placebo, isradipine reduced ambulatory blood pressure from 174/104 to 154/91 (p less than 0.001), whereas the heart rate was unchanged. The reduction of blood pressure was entirely due to a reduction (36 percent; p less than 0.001) of the peripheral resistance. The baroreceptor sensitivity did not change (RR intervals during infusion of phenylephrine) but, with isradipine, the setpoint was shifted to lower blood pressure levels. Renal plasma flow (para-amino hippurate clearance) increased (465 versus 391 ml/minute; p less than 0.05), but glomerular filtration rate ([51Cr]ethylenediaminetetraacetic acid clearance) did not change. Hence, the filtration fraction decreased. With isradipine, there was a post-dose increase in natriuresis (0.45 to 0.34 mmol/minute; p = 0.06). Side effects were mild.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piridinas
/
Bloqueadores dos Canais de Cálcio
/
Hemodinâmica
/
Hipertensão
/
Rim
/
Anti-Hipertensivos
Tipo de estudo:
Clinical_trials
Limite:
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Am J Med
Ano de publicação:
1989
Tipo de documento:
Article
País de afiliação:
Suécia