Navalny, 44, was imprisoned in February and is serving two-and-a-half years on old embezzlement charges. File
Jailed Kremlin critic Alexei Navalny risks cardiac arrest at "any minute" as his health has rapidly deteriorated, doctors warned Saturday, urging immediate access to Russia's most famous prisoner.
On March 31, President Vladimir Putin's most prominent opponent went on hunger strike to demand proper medical treatment for back pain and numbness in his legs and hands.
Navalny, 44, was imprisoned in February and is serving two-and-a-half years on old embezzlement charges in a penal colony in the town of Pokrov around 100 kilometres (60 miles) east of Moscow.
Navalny's personal doctor Anastasia Vasilyeva and three more doctors including cardiologist Yaroslav Ashikhmin have asked prison officials to grant them immediate access.
"Our patient can die any minute," Ashikhmin said on Facebook on Saturday, pointing to the opposition politician's high potassium levels and saying Navalny should be moved to intensive care. "Fatal arrhythmia can develop any minute."
Navalny barely survived a poisoning with the Novichok nerve agent in August, which he has blamed on the Kremlin. His doctors say his hunger strike might have exacerbated his condition.
Having blood potassium levels higher than 6.0 mmol (millimole) per litre usually requires immediate treatment. Navalny's were at 7.1, the doctors said.
"This means both impaired renal function and that serious heart rhythm problems can happen any minute," said a statement on Vasilyeva's Twitter account. The doctors said he had to be examined immediately "taking into account the blood tests and his recent poisoning."
'Alexei is dying'
Navalny's spokeswoman Kira Yarmysh, who accompanied him when he collapsed on a plane after the poisoning in August, said the situation was critical again.
"Alexei is dying," she said on Facebook. "With his condition it's a matter of days."
She said she felt like she was "on that plane again, only this time it's landing in slow motion", pointing out that access to Navalny was restricted and few Russians were aware of what was actually going on with him in prison.
More than 70 prominent international writers, artists and academics, including Jude Law, Vanessa Redgrave and Benedict Cumberbatch, have called on Putin to ensure that Navalny receives proper treatment immediately. Their appeal was published late on Friday by France's Le Monde newspaper.
The announcement came as the European Union’s top diplomat told Russia’s foreign minister that the treatment of Navalny represents "a low point” in the relations between Brussels and Moscow.
Russia's FSIN prison authority confirmed that officers had detained the prominent critic of President Vladimir Putin, the Interfax news agency reported.
For a decade, Russian President Vladimir Putin has avoided putting his gadfly opponent Alexey Navalny behind bars for any considerable length of time — until Tuesday, when a Moscow court ordered Navalny to spend the next two-and-a-half years in prison.
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