The effect of intravenous ferric carboxymaltose on cardiac reverse remodelling following cardiac resynchronization...

Area of Science:

• Cardiology
• Cardiovascular Medicine
• Pharmacology

Background:

• Iron deficiency is prevalent in heart failure with reduced ejection fraction (HFrEF), negatively impacting cardiac function and structure.
• Cardiac resynchronization therapy (CRT) is a treatment for HFrEF, but some patients remain symptomatic with reduced ejection fraction.

Purpose of the Study:

• To investigate the effect of ferric carboxymaltose (FCM) on cardiac reverse remodeling and contractile status in HFrEF patients with iron deficiency.
• To assess if FCM can improve left ventricular ejection fraction (LVEF) and cardiac performance in HFrEF patients post-CRT.

Main Methods:

• A prospective, double-blind, randomized study involving symptomatic HFrEF patients with iron deficiency and LVEF <45% at least 6 months post-CRT.
• Patients were randomized to receive either FCM or standard of care (SOC).
• Primary endpoint was the change in LVEF at 3-month follow-up; secondary endpoints included changes in left ventricular volumes and the force-frequency relationship.

Main Results:

• The FCM group showed a significantly greater increase in LVEF (+4.22%) compared to the SOC group (-0.23%) after 3 months (P < 0.001).
• Left ventricular end-systolic volume (LVESV) significantly improved in the FCM group, indicating reverse remodeling.
• FCM treatment improved the cardiac force-frequency relationship, suggesting enhanced cardiac contractility, and led to better functional status and exercise capacity.

Conclusions:

• Ferric carboxymaltose (FCM) treatment in HFrEF patients with iron deficiency and persistent low LVEF post-CRT leads to significant improvements in cardiac function.
• Key improvements include increased LVEF, reduced LVESV, and enhanced cardiac contractility as evidenced by the force-frequency relationship.
• FCM is a viable therapeutic option for improving cardiac remodeling and function in this patient population.