Why Lee Sang-soon stopped hosting his radio show: Reduced vagal function, not vasovagal syncope

Lee Sang-soon has paused his radio show after doctors advised him to rest because of neurological symptoms related to what he described as reduced vagal function. The singer, who is married to singer Lee Hyori, said on social media that he had been unable to host the program for several days and that many people had been worried.

He said he was still waiting for detailed tests. “I am taking a break from the radio on the advice of medical staff, who said I need to rest because of neurological symptoms called reduced vagal function,” he wrote. His radio absence began on the 26th of last month.

The vagus nerve forms a major part of the parasympathetic nervous system and helps regulate automatic functions including the heartbeat, blood pressure and digestion. But the term Lee used should not automatically be treated as the same condition as vasovagal syncope, the article cautions, especially because he has not yet received the results of his detailed examinations.

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I have been unable to host the radio for several days, and many people have been worried.

Vasovagal syncope occurs when the autonomic nervous system overreacts to a particular situation, causing blood pressure to drop or the heart rate to slow. Reduced blood flow to the brain can then lead to temporary loss of consciousness. Warning symptoms may include dizziness, nausea, cold sweats, paleness, a sudden feeling of heat, blurred or narrowed vision, muffled hearing and weakness. Episodes can occur after prolonged standing, exposure to heat, severe pain or fear, or during blood tests and injections. Fatigue, lack of sleep, stress and dehydration can make symptoms more likely.

Shin Seung-yong, a professor at Seoul St. Mary’s Hospital’s cardiovascular and cerebrovascular hospital, said people who recognize familiar warning signs should sit somewhere safe rather than try to remain standing. If possible, lying down and raising the legs may help. The article also warns that fainting can result from arrhythmia or structural heart disease. Lee is resting on medical advice while he waits for further tests.

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I am taking a break from the radio on the advice of medical staff, who said I need to rest because of neurological symptoms called reduced vagal function.