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Updated: Mar 29, 2026

Mechanical Control of Relaxation Using Intact Cardiac Trabeculae
Published on: February 17, 2023
Serelaxin and acute heart failure.
Jeremy Tietjens1, John R Teerlink2
1School of Medicine, University of California San Francisco, San Francisco, California, USA.
Serelaxin, a novel therapeutic agent, shows promise for acute heart failure (AHF) treatment. Clinical trials indicate it improves symptoms, reduces hospital stays, and increases survival rates in AHF patients.
Area of Science:
- Cardiology
- Pharmacology
- Endocrinology
Background:
- Developing novel treatments for acute heart failure (AHF) has faced significant challenges.
- Relaxin, a human peptide hormone, influences hemodynamic adaptations during pregnancy.
- Serelaxin, a recombinant human relaxin-2, is being investigated for AHF treatment.
Purpose of the Study:
- To review the physiological function and mechanism of action of serelaxin.
- To present clinical trial results for serelaxin in AHF patients.
- To discuss future directions for serelaxin in AHF therapy.
Main Methods:
- Review of physiological effects and mechanism of action of serelaxin.
- Analysis of data from a 1161-patient, placebo-controlled Phase III trial (RELAX-AHF).
- Inclusion of ongoing Phase III trials (RELAX-AHF-2; RELAX-AHF-ASIA).
Main Results:
- Serelaxin demonstrated beneficial hemodynamic effects, including decreased pulmonary and systemic resistance and increased renal blood flow.
- The RELAX-AHF trial showed significant improvements in AHF symptoms and reduced worsening of heart failure.
- Serelaxin treatment led to decreased hospital length of stay and increased 180-day survival post-hospitalization.
Conclusions:
- Serelaxin exhibits a favorable safety and efficacy profile for AHF treatment.
- Further trials are ongoing to confirm and expand upon these findings.
- Serelaxin represents a potential new therapeutic option for patients suffering from acute heart failure.
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