Chronic sinus node dysfunction leads to Sick Sinus Syndrome. What is the primary treatment?

Chronic sinus node dysfunction leads to Sick Sinus Syndrome. What is the primary treatment?

• A. Beta-blocker therapy.
• B. Implantable cardioverter-defibrillator.
• C. Catheter ablation.
• D. Permanent pacemaker.

Answer: (D)

Chronic sinus node dysfunction causes the heart to pace too slowly or have long pauses, leading to symptoms like dizziness, fatigue, or fainting. The main goal is to provide a reliable heart rate and maintain adequate AV synchrony when the intrinsic SA node fails. A permanent pacemaker achieves this by continuously monitoring the heart and delivering pacing stimuli when the natural SA node doesn’t fire, preventing bradycardia and pauses. In many patients, a dual‑chamber pacemaker is used to preserve coordination between the atria and ventricles, especially if there’s intact AV conduction but unreliable sinus rhythm. Beta-blocker therapy would worsen slow heart rates and isn’t a solution here. An implantable cardioverter-defibrillator is designed for malignant tachyarrhythmias or high-risk sudden death scenarios, not for sinus node failure. Catheter ablation targets specific arrhythmias or pathways and is not a cure for SA node dysfunction. Temporary pacing might be used acutely, but the definitive long‑term treatment for chronic sinus node dysfunction is a permanent pacemaker.

Chronic sinus node dysfunction causes the heart to pace too slowly or have long pauses, leading to symptoms like dizziness, fatigue, or fainting. The main goal is to provide a reliable heart rate and maintain adequate AV synchrony when the intrinsic SA node fails. A permanent pacemaker achieves this by continuously monitoring the heart and delivering pacing stimuli when the natural SA node doesn’t fire, preventing bradycardia and pauses. In many patients, a dual‑chamber pacemaker is used to preserve coordination between the atria and ventricles, especially if there’s intact AV conduction but unreliable sinus rhythm.

Beta-blocker therapy would worsen slow heart rates and isn’t a solution here. An implantable cardioverter-defibrillator is designed for malignant tachyarrhythmias or high-risk sudden death scenarios, not for sinus node failure. Catheter ablation targets specific arrhythmias or pathways and is not a cure for SA node dysfunction. Temporary pacing might be used acutely, but the definitive long‑term treatment for chronic sinus node dysfunction is a permanent pacemaker.