Written by Shannon Markus
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Risk of hypotension (SBP < 90mmHg) as a direct result of IV furosemide administration during acute decompensated heart failure treatment is very low.
Furosemide decreases fluid overload, not BP
In this multicenter prospective observational study, 253 acute decompensated heart failure (ADHF) patients underwent continuous noninvasive blood pressure monitoring across five U.S. emergency departments. Over 598.2 person-hours (91,210 observations), investigators evaluated SBP responses and hypotension incidence before and after IV furosemide administration. Analyses adjusted for 36 confounders, including baseline hemodynamics, comorbidities, and concurrent therapies. IV furosemide explained only 1.4% of SBP variance and 1.7% of hypotension risk; 79.6% and 58.1% of total variance, respectively, were accounted for by other variables. Mean SBP decreased minimally (~6 mmHg) post-diuresis, with no sustained hypotension lasting more than 30 minutes. Hypotension incidence (<90 mmHg) was 6% overall and was unaffected by diuretic administration. Dose-dependent effects peaked 100–200 minutes post-dose and were transient. Findings indicate that IV-furosemide-related hypotension in ADHF is uncommon, mild, and largely predictable, supporting guideline-directed diuresis without undue concern for hemodynamic compromise. Results are somewhat limited by being observational rather than experimental, but an IV furosemide versus placebo trial is unlikely to occur.
How does this change my practice?
I found this study reassuring. Furosemide can be started safely for my floridly volume-overloaded patients who would benefit from early diuresis in the ED… as long as I select the right patients. The key takeaway for me was identifying which patients are at higher risk for hypotension, and here’s the list so you don’t have to dig: those with low LVEF, advanced age, lower baseline SBP, higher BMI, diabetes, outpatient beta-blocker use, elevated troponin, hyponatremia, hypokalemia, active bradycardia, active atrial fibrillation.
Source
Blood Pressure Effects and Risk of Hypotension due to Intravenous Furosemide in Acute Decompensated Heart Failure. Acad Emerg Med. 2025 Aug 28. doi: 10.1111/acem.70125. Epub ahead of print. PMID: 40877742.
