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Sinus Node Dysfunction (Sick Sinus Syndrome)

A group of arrhythmias caused by impaired impulse generation or conduction of the sinus node.

Written by: Saygı Hospital Health Guide Editorial Board
Published:

This content is for general information; please consult your physician for diagnosis and treatment.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Kardiyoloji department. Book Appointment →

What is Sinus Node Dysfunction (Sick Sinus Syndrome)?

Sinus node dysfunction (sick sinus syndrome) is a chronic rhythm disorder caused by impaired impulse generation or conduction of the sinus node. It may present as sinus bradycardia, sinus pauses, sinoatrial block or tachy-brady syndrome.

Fibrosis of the sinus node is the main cause in older patients; ischemia, infiltrative diseases, autonomic dysfunction and drugs (beta-blockers, calcium channel blockers, digoxin) can also precipitate it.

Diagnosis is based on ECG, ambulatory rhythm monitoring and electrophysiology study. Permanent pacemaker implantation is the definitive therapy in symptomatic patients; anticoagulation may be needed given the risk of atrial fibrillation and thromboembolism.

Symptoms

Fatigue and weakness
Dizziness and lightheadedness
Syncope and presyncope
Palpitations in the tachy phase
Exercise intolerance
Confusion (in older adults)
Worsening heart failure symptoms

Risk Factors

Advanced age
Ischemic heart disease
Amyloidosis and infiltrative cardiomyopathy
History of cardiac surgery
Hypothyroidism
Autoimmune disease
Chronic drug therapy (beta-blockers, digoxin)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Syncope or presyncope
  • Marked fatigue and exercise intolerance
  • New tachy-brady symptoms
  • Pathological findings on ambulatory monitoring
  • Need for anticoagulation

Treatment Methods

01
Discontinue drugs that cause unnecessary bradycardia
02
Treat the underlying cause (ischemia, hypothyroidism)
03
Permanent pacemaker in symptomatic patients
04
Anticoagulation and rate control in tachy-brady syndrome
05
Long-term cardiology follow-up
06
Device checks and lifestyle adjustments

Which Department to Visit?

You can visit our Kardiyoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Let us help you

You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.