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[Deciding about pacing mode in sinus node dysfunction: should carotid sinus massage be performed and in which
N Fonseca1, L Soares, L Parreira
1Serviço de Cardiologia-Hospital de São Bernardo, Setúbal.
Summary
Carotid sinus syndrome (CSS) affects nearly 19% of patients with sinus node dysfunction (SND) requiring a pacemaker. Incorporating carotid sinus massage into pacemaker selection protocols improves patient outcomes.
Area of Science:
- Cardiology
- Electrophysiology
Background:
- Sinus node dysfunction (SND) is a common indication for permanent pacemaker (PM) implantation.
- Carotid sinus syndrome (CSS) can coexist with SND, complicating pacing decisions.
Observation:
- A prospective study followed 69 patients with SND undergoing PM implantation.
- Carotid sinus massage was used to guide pacemaker selection (AAI vs. DDD).
- Atrioventricular node involvement was observed in 56% of patients with SND.
Findings:
- A significant association between SND and CSS was found in 18.8% of patients.
- All patients experienced complete symptom remission post-pacemaker implantation.
- Carotid sinus massage response in the clinic mirrored surgical room findings.
Implications:
- Carotid sinus massage is a valuable tool in defining pacing mode for SND patients.
- This diagnostic approach influences pacemaker choice in a notable percentage of patients.
- Integrating CSS evaluation into SND protocols can optimize pacemaker therapy.