Inappropriate shock and percutaneous cardiac intervention: A lesson to learn in the cath lab

Area of Science:

• Cardiology
• Electrophysiology
• Interventional Cardiology

Background:

• Coronary artery disease frequently coexists with heart failure with reduced ejection fraction (HFrEF).
• Implantable cardioverter defibrillators (ICDs) are indicated for HFrEF patients to prevent sudden cardiac death from arrhythmias.
• Inappropriate shocks from ICDs are linked to adverse outcomes, including reduced quality of life and increased mortality.

Observation:

• A case report details an inappropriate ICD shock during percutaneous coronary intervention (PCI).
• The shock occurred during guidewire insertion and advancement into the left anterior descending (LAD) artery.
• Noise generated during the coronary procedure was implicated in triggering the shock.

Findings:

• Procedural noise during PCI can lead to inappropriate ICD shocks in patients with cardiac electronic devices.
• This highlights a potential risk during interventions in patients with implanted defibrillators.
• The specific event involved guidewire manipulation within the LAD artery.

Implications:

• Physicians must be aware of the potential for inappropriate shocks or pacing inhibition in patients with ICDs or pacemakers during coronary procedures.
• Recognizing procedural noise as a potential trigger is vital for patient safety.
• Consideration should be given to lead placement or potential helix protrusion into the coronary lumen as contributing factors.