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Loop Diuretic Use is Associated With Adverse Clinical Outcomes in Acute Myocardial Infarction Patients With Low

Tsutomu Kawai1, Daisaku Nakatani2, Tetsuya Watanabe1

  • 1Division of Cardiology, Osaka General Medical Center, Osaka, Japan.

Current Problems in Cardiology
|July 23, 2022
PubMed

Insights

Loop diuretic use after acute myocardial infarction (AMI) increases poor prognosis risk in patients with low plasma volume status. Careful observation is needed for these AMI patients without plasma volume expansion.

Area of Science:

  • Cardiology
  • Pharmacology
  • Clinical Medicine

Background:

  • Acute myocardial infarction (AMI) management involves addressing fluid balance.
  • Loop diuretics are commonly prescribed, but their impact on prognosis varies.
  • Plasma volume status is a critical factor in cardiovascular outcomes.

Purpose of the Study:

  • To investigate the prognostic impact of loop diuretics in AMI patients.
  • To assess if plasma volume status modifies the effect of loop diuretics.
  • To determine optimal diuretic use in post-AMI care.

Main Methods:

  • Study included 3,364 AMI survivors from the Osaka Acute Coronary Insufficiency Study (OACIS) database.
  • Plasma volume status assessed by estimated plasma volume status (ePVS) at discharge.
  • Composite endpoint of all-cause death and heart failure rehospitalization over 5 years.

Main Results:

  • Loop diuretic use was linked to increased risk in patients with low ePVS (HR 2.572).
  • No significant increased risk was observed in patients with high ePVS (HR 1.028).
  • Findings remained consistent in propensity-score matched cohorts.

Conclusions:

  • Loop diuretic prescription at discharge is associated with poor prognosis in AMI patients without plasma volume expansion.
  • Careful monitoring is essential when prescribing loop diuretics for AMI patients with low plasma volume.
  • Plasma volume status is a key determinant of loop diuretic efficacy and safety post-AMI.

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