New Delhi: An unusual heart rhythm disorder, also known as Postural orthostatic tachycardia syndrome (POTS), is more common in people with long Covid, according to a study.

The study found that the condition, where the heart beats abnormally fast when changing position from lying down to standing up, is more common in middle-aged women than men.

For people affected with POTS, standing up is a challenge. Their hearts beat faster than normal at rest and during exertion. Patients also experience fatigue and difficulties concentrating -- symptoms that are common in long Covid.

Researchers at Karolinska Institutet in Sweden found that POTS occurs in almost a third of patients with severe long Covid.

"Previous, smaller studies have shown that there is a connection, but now we can say with

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