At Cardiology Center Zacharias Kounnis, a leading cardiology center in Limassol, we often see patients who experience a rapid heartbeat that doesn’t seem to match their activity level. This can be caused by two commonly misunderstood conditions: Inappropriate Sinus Tachycardia (IST) and Postural Orthostatic Tachycardia Syndrome (POTS). Though different in their mechanisms, both conditions can significantly impact daily life—and both can be managed effectively with the right diagnosis and care.

💓 What is Inappropriate Sinus Tachycardia (IST)?

IST is a condition where the sinus node (the natural pacemaker of the heart) sends signals too frequently, leading to an elevated heart rate at rest or with minimal activity. Unlike normal physiological responses to exercise or stress, IST has no obvious trigger. The heart may beat too fast even while sitting or lying down.

Common Symptoms:

• Persistent or sudden palpitations
• Lightheadedness or dizziness
• Chronic fatigue
• Shortness of breath
• Anxiety or a sense of “heart racing”

📈 What is Postural Orthostatic Tachycardia Syndrome (POTS)?

POTS is a type of dysautonomia, which affects the autonomic nervous system. It is defined by a significant increase in heart rate upon standing, without a corresponding drop in blood pressure. It mostly affects young adults, especially women, and can be misdiagnosed as anxiety or panic disorder.

Key Symptoms:

• Rapid heartbeat upon standing
• Dizziness or fainting
• Brain fog or difficulty concentrating
• Nausea
• Weakness and extreme fatigue

Both IST and POTS require a careful and specialized approach to diagnosis and management, which is where the expertise of the best cardiology center in Cyprus comes in.

🔬 Causes and Triggers

While the exact cause of IST and POTS isn’t always clear, several factors may contribute:

• Autonomic nervous system dysfunction
• Genetics or hormonal imbalances
• Dehydration or low blood volume
• Certain medications or stimulant use
• Stress and overexertion

At Cardiology Center Zacharias Kounnis, we utilize advanced diagnostic tools such as Holter monitors, tilt-table testing, and ECGs to ensure accurate assessment.

🩺 Treatment Options at Cardiology Center Zacharias Kounnis

Treatment for IST and POTS is highly individualized and often includes a combination of:

• Lifestyle adjustments: increased hydration, salt intake, and graded exercise programs
• Medications: beta-blockers, ivabradine, fludrocortisone, or midodrine
• Catheter ablation (for IST in severe cases)
• Nutritional and psychological support to manage stress and associated symptoms

As a top-rated cardiology center in Limassol, we provide comprehensive follow-up and patient education to help our patients regain control of their lives.

🌍 Why Choose Cardiology Center Zacharias Kounnis?

When it comes to complex conditions like IST and POTS, experience matters. At Cardiology Center Zacharias Kounnis, recognized as the best cardiology center in Cyprus, our team of expert cardiologists offers:

• Personalized, evidence-based treatment plans
• Multidisciplinary care with a focus on long-term wellness
• State-of-the-art diagnostic technology
• A compassionate approach in a comfortable clinical setting

📞 Take Control of Your Heart Health Today

If you’ve been struggling with unexplained palpitations, fatigue, or dizziness, don’t dismiss your symptoms. Schedule a consultation at Cardiology Center Zacharias Kounnis—your trusted cardiology center in Limassol—and let us help you find clarity and relief.

‍