Clinical and neurohumoral consequences of diuretic withdrawal in patients with chronic, stabilized heart failure and systolic dysfunction.
Eur J Heart Fail
; 7(5): 892-8, 2005 Aug.
Article
em En
| MEDLINE
| ID: mdl-16087141
ABSTRACT
BACKGROUND:
Loop diuretics are beneficial in heart failure in the short term because they eliminate fluid retention, but in the long-term, they could adversely influence prognosis due to activation of neurohumoral mechanisms.AIMS:
To explore the changes induced by diuretic withdrawal in chronic nonadvanced heart failure.METHODS:
Diuretics were withdrawn in 26 stabilized heart failure patients with systolic dysfunction (ejection fraction [EF]<45%). Clinical status was evaluated by physical exam, exercise capacity (corridor test) and New York Heart Association (NYHA) class. Biochemical and neurohumoral determinations were performed at baseline and at 3 months.RESULTS:
At 3 months, 17 out of 26 patients (65%) were able to tolerate diuretic interruption without a deterioration in exercise capacity or New York Heart Association functional class. Renal function parameters improved (baseline urea 46.2+/-10.8 to 39.2+/-10.1 mg/dl at 3 months, p=0.014; creatinine 1.1+/-0.23 to 0.98+/-0.2 mg/dl, p=0.013). Glucose metabolism also improved (fasting glucose 151+/-91 to 122+/-14 mg/dl, p=0.035). Heart rate and systolic blood pressure did not significantly change, while diastolic blood pressure increased (from 80+/-10 to 87+/-13 mm Hg, p=0.006). Neurohumoral determinations showed a decrease in plasma renin activity (4.19+/-5.96 to 2.88+/-4.98 ng/ml, p=0.026), with no changes in aldosterone, arginine-vasopressin, endothelin-1 and norepinephrine. In contrast, atrial natriuretic peptide significantly increased (115+/-87 to 168+/-155 pg/ml, p=0.004).CONCLUSION:
Diuretic withdrawal in stabilized heart failure with systolic dysfunction is associated with an improvement in renal function parameters, glucose metabolism and some neurohumoral parameters, such as plasma renin activity; however, atrial natriuretic peptide levels increased.
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Base de dados:
MEDLINE
Assunto principal:
Diuréticos
/
Inibidores de Simportadores de Cloreto de Sódio e Potássio
/
Insuficiência Cardíaca
Tipo de estudo:
Prognostic_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2005
Tipo de documento:
Article