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Hypotension is associated with diuretic resistance in severe chronic heart failure, independent of renal function

C G De Pasquale1, J S Dunne, R B Minson

  • 1Cardiac Services, Flinders Medical Centre, Flinders Drive, Bedford Park, 5042, South Australia, Australia. carmine.depasquale@fmc.sa.gov.au

European Journal of Heart Failure
|May 27, 2005
PubMed

Insights

Hypotension is linked to higher diuretic doses in severe chronic heart failure (CHF). This association, independent of kidney function, may explain diuretic resistance in CHF patients.

Area of Science:

  • Cardiology
  • Pharmacology
  • Nephrology

Background:

  • Diuretic resistance and systemic hypotension are common challenges in chronic heart failure (CHF).
  • The relationship between these two common complications in CHF has not been previously established.
  • Blood pressure's role in sodium excretion suggests a potential link to diuretic response.

Purpose of the Study:

  • To investigate the association between blood pressure (BP) and diuretic dosage in patients with severe CHF.
  • To determine if BP is a significant factor influencing the need for higher diuretic doses.

Main Methods:

  • Retrospective review of a severe CHF patient database.
  • Cohort of 54 patients with severe left ventricular systolic dysfunction.
  • Patients categorized by frusemide dosage: high-dose (≥250 mg daily) versus standard-dose.

Main Results:

  • Patients on high-dose frusemide exhibited lower systolic and diastolic BP.
  • Higher serum creatinine levels were also observed in the high-dose frusemide group.
  • Reduced diastolic BP and increased serum creatinine independently predicted high-dose frusemide use.

Conclusions:

  • An association exists between hypotension and high-dose frusemide use in severe CHF.
  • This relationship is independent of renal function.
  • Hypotension may represent a key physiological mechanism contributing to diuretic resistance in severe CHF.
Abstract

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