Efficacy of Coronary Sinus Pacing for Cardiogenic Shock Due to Percutaneous Coronary Intervention-induced Sick Sinus...

Area of Science:

• Cardiology
• Electrophysiology
• Interventional Cardiology

Background:

• Sick sinus syndrome (SSS) can cause hemodynamic instability and cardiogenic shock.
• Percutaneous coronary intervention (PCI) can sometimes induce SSS due to complications like impaired sinus node artery (SNA) blood flow.
• Ventricular pacing alone may be insufficient to manage SSS-induced hemodynamic compromise.

Observation:

• Two cases presented with cardiogenic shock and SSS post-PCI.
• The SSS was attributed to compromised SNA flow, with a stent jailed across the lesion.
• Initial management with ventricular pacing alone did not adequately stabilize hemodynamics.

Findings:

• Combined atrial pacing and coronary sinus (CS) pacing successfully improved hemodynamic instability in both cases.
• This dual-pacing strategy effectively addressed the challenges posed by SSS when ventricular pacing was inadequate.
• The findings suggest a potential benefit of adding atrial pacing to CS pacing in specific SSS scenarios.

Implications:

• Atrial pacing combined with CS pacing may be a valuable therapeutic option for managing hemodynamic instability in PCI-induced SSS.
• This approach could offer an alternative or adjunct to standard pacing in complex cases of SSS.
• Further research is warranted to explore the broader applicability and long-term efficacy of this combined pacing strategy.