Electrical Storm Induced by Cardiac Resynchronization: Efficacy of the Multipoint Pacing Stimulation
Anna Gonella1, Carmelo Casile1, Endrj Menardi1
1Department of Cardiology, Ospedale Regina Montis Regali, Strada del Rocchetto 99, 12084 Mondovì, Italy.
Diseases (Basel, Switzerland)
|May 24, 2024
Summary
Cardiac resynchronization therapy (CRT) can induce ventricular tachycardia. Multipoint pacing (MPP) near scar tissue may prevent this by blocking reentry pathways, improving patient safety.
Area of Science:
- Cardiology
- Electrophysiology
- Medical Devices
Background:
- Cardiac resynchronization therapy (CRT) improves outcomes in heart failure patients with left ventricular (LV) dyssynchrony.
- However, CRT can paradoxically induce proarrhythmia, a pro-arrhythmic effect, with mechanisms remaining unclear.
Observation:
- A case report details polymorphic ventricular tachycardia induced immediately after initiating CRT in a patient.
- The induced ventricular tachycardia (VT) was linked to LV pacing.
Findings:
- Changing the pacing configuration to multipoint pacing (MPP) near a scar area was associated with the cessation of induced VT.
- This suggests VT was caused by a reentry mechanism facilitated by a unidirectional block.
Implications:
- Multipoint pacing (MPP) may prevent CRT-induced ventricular tachycardia by mitigating unidirectional blocks and reentry phenomena.
- This strategy could enhance the safety of CRT in heart failure patients, particularly those with myocardial scar.
