Why Does Your Heart Race When You Stand? Understanding POTS Syndrome

fin.co.id - Have you ever stood up and suddenly felt your heart pounding in your chest, dizziness creeping in, or even a brief sensation of almost fainting? For many people, these unsettling moments may indicate a condition called POTS Syndrome, or Postural Orthostatic Tachycardia Syndrome. While often misunderstood, POTS is a recognized autonomic disorder that affects thousands of individuals worldwide, particularly young adults and women.

Unlike typical heart disease, POTS does not usually involve structural issues of the heart. Instead, it is a dysfunction of the autonomic nervous system—the network responsible for regulating heart rate, blood pressure, and circulation. This disruption leads to a rapid heartbeat upon standing, sometimes accompanied by fatigue, brain fog, and other symptoms that can significantly affect daily life.

What Is POTS Syndrome?

POTS Syndrome is a chronic condition characterized by an abnormal increase in heart rate when moving from a lying or sitting position to standing. Specifically, medical guidelines note an increase of 30 beats per minute (bpm) or more within the first 10 minutes of standing, without a significant drop in blood pressure.

Patients often describe a combination of palpitations, lightheadedness, fatigue, and cognitive difficulties, which can sometimes be misdiagnosed as anxiety or other heart-related conditions. Understanding the syndrome is crucial for timely diagnosis and management.

Common POTS Symptoms

Identifying POTS symptoms early can help in seeking appropriate care. Some of the most frequently reported symptoms include:

• Rapid heart rate upon standing (tachycardia)

• Dizziness or lightheadedness

• Fainting or near-fainting spells

• Fatigue that interferes with daily activities

• Brain fog and difficulty concentrating

• Palpitations or irregular heartbeat

• Nausea, headaches, or tremors

The intensity and combination of symptoms can vary widely among patients, making personalized medical evaluation essential.

Causes and Risk Factors

While the exact cause of Postural Orthostatic Tachycardia Syndrome remains unclear, several factors are known to contribute:

• Genetic predisposition

• Viral infections , including those associated with Long COVID

• Autoimmune disorders

• Prolonged bed rest or physical deconditioning

• Trauma or surgery

Women, particularly between the ages of 15 and 50, are disproportionately affected, although men and older adults can also develop the condition.

How POTS Affects Heart Function