[Prognostic evaluation of sick sinus syndrome]

Area of Science:

• Cardiology
• Electrophysiology
• Internal Medicine

Background:

• Sick sinus syndrome (SSS) is a common cardiac arrhythmia.
• Understanding SSS progression and its impact on patient outcomes is crucial.
• Previous studies have not fully elucidated the relationship between SSS severity and specific arrhythmias.

Purpose of the Study:

• To investigate the relationship between the severity of sick sinus syndrome (SSS) and the incidence of persistent atrial fibrillation/flutter.
• To assess the impact of persistent atrial fibrillation/flutter on mortality rates in SSS patients.
• To evaluate the role of cardiac pacemakers in managing decompensated SSS.

Main Methods:

• A retrospective study of 114 patients with SSS followed for 2-10 years.
• Patients were categorized into three groups based on SSS severity: latent, compensated, and decompensated.
• Data collected included incidence of paroxysmal and persistent atrial fibrillation/flutter, mortality rates, and pacemaker usage.

Main Results:

• While paroxysmal atrial fibrillation/flutter rates were similar across SSS severity groups, persistent atrial fibrillation/flutter was significantly higher in decompensated SSS (27%) compared to latent (9.1%) and compensated (11.4%) groups.
• Mortality rate was substantially higher in SSS patients with persistent atrial fibrillation/flutter (38.9%) versus those without (4.2%).
• No statistically significant difference in mortality was observed between decompensated SSS patients with pacemakers (10.5%) and those without (16.6%).

Conclusions:

• Persistent atrial fibrillation/flutter is a significant predictor of mortality in sick sinus syndrome patients.
• Decompensated SSS is associated with a higher incidence of persistent atrial fibrillation/flutter.
• Cardiac pacemakers did not show a statistically significant impact on mortality in decompensated SSS patients in this cohort.