Symptoms

Most people with sick sinus syndrome have few or no symptoms. Symptoms may be mild or come and go — making them difficult to recognize at first.

Signs and symptoms of sick sinus syndrome may include:

• Fatigue
• Dizziness or lightheadedness
• Fainting or near fainting
• Shortness of breath
• Chest pain or discomfort
• Confusion
• Slower than normal pulse (bradycardia)
• A sensation of rapid, fluttering heartbeats (palpitations)

When to see a doctor

Talk to your doctor if you have any signs or symptoms of sick sinus syndrome. Many medical conditions can cause these problems, and it's important to get a timely and accurate diagnosis.

If you have new or unexplained chest pain or suspect you're having a heart attack, call for emergency medical help immediately.