What is Postural Orthostatic Tachycardia Syndrome (POTS)?

Postural Orthostatic Tachycardia Syndrome (POTS) is a condition characterized by an abnormal increase in heart rate upon transitioning from a sitting or lying position to standing [4]. This condition occurs because the autonomic nervous system, which regulates involuntary functions like heart rate and blood pressure, does not respond appropriately to changes in body position, leading to symptoms that can significantly impact daily life [4].

It is important to note that diagnosis requires precision, as the symptoms of this syndrome can mimic other conditions such as low blood pressure or certain heart diseases [4]. For more information regarding issues associated with this system, you may refer to Autonomic Nervous System Disorders: Symptoms, Diagnosis, and Management (Arabic).

Common Symptoms of POTS

Symptoms vary from person to person and often worsen when standing or remaining upright for long periods. The most common symptoms include:

• A noticeable increase in heart rate (palpitations).
• Feeling dizzy or lightheaded, and in some cases, fainting or near-fainting.
• Severe fatigue and general weakness.
• Shortness of breath and chest pain.
• Concentration and memory issues, commonly known as "brain fog."
• Gastrointestinal symptoms such as nausea, bloating, diarrhea, or constipation.
• Sleep disturbances and difficulty getting restful sleep.
• Discoloration of the hands and feet, often turning a purplish hue.

You may notice that symptoms worsen in the morning, upon exposure to heat, or after consuming meals rich in carbohydrates [4].

How is it Diagnosed?

Diagnosis involves a careful evaluation by a physician, during which heart rate and blood pressure are measured while lying down and after standing. Scientifically, the condition is confirmed when adults demonstrate a sustained increase in heart rate of more than 30 beats per minute upon standing compared to the supine position, without a drop in blood pressure, and with symptoms persisting for at least 3 months [5]. The doctor may also request an electrocardiogram (ECG) to rule out any cardiac rhythm disorders [4].

Condition Management and Daily Life

There is no permanent cure for POTS, but effective strategies are available to manage symptoms and improve quality of life. Key steps include:

• Increasing regular fluid intake to maintain blood volume.
• Eating small, frequent meals while reducing carbohydrates.
• Using compression stockings to improve blood flow in the lower extremities [4].
• Engaging in light, regular physical exercise such as swimming or Pilates, ensuring you stop immediately if symptoms appear [4].
• If lifestyle changes are insufficient, a physician may prescribe medications to help control heart rate, such as beta-blockers or ivabradine [5].

If you feel sudden dizziness, it is recommended to lie down immediately and elevate your legs, or perform simple movements such as tensing your abdominal or leg muscles if lying down is not possible [4]. Please always consult a physician before starting any treatment plan or new medication.

Medical references

• Postural tachycardia syndrome (PoTS) - NHS
• Postural tachycardia syndrome (PoTS) | Right Decisions