Getting a pacemaker after heart surgery may be lifesaving in the moment, but a new study suggests it comes with serious long-term trade-offs. Researchers analyzed data from over 76,000 adults who underwent cardiac surgery in Sweden between 2006 and 2020, tracking outcomes for an average of nearly 7 years. Those who received a permanent pacemaker within 30 days of surgery had meaningfully higher risks of death and heart failure hospitalization compared to those who didn't.

Implantable cardioverter defibrillators (ICDs), used in a smaller subset of patients, told a slightly different story — they weren't linked to higher overall mortality, but were associated with a doubled risk of heart failure hospitalization and a higher risk of cardiovascular death specifically.

By the Numbers:

• 2.8% of patients received a permanent pacemaker post-surgery; 0.5% received an ICD
• Pacemaker recipients had a 9% higher risk of all-cause mortality (aHR 1.09) and a 36% higher risk of heart failure hospitalization (aHR 1.36)
• ICD recipients had a 107% higher risk of heart failure hospitalization (aHR 2.07) and a 30% higher risk of cardiovascular death (aHR 1.30)

Why it matters: These findings don't mean pacemakers should be avoided — they're often essential. But they do signal that clinicians should proactively choose pacing strategies that reduce ventricular dyssynchrony and watch closely for signs of pacing-related heart failure in post-surgical patients.