A Russian woman recently died, incredibly and tragically, after suffering a heart attack brought on by the utter shock of waking up at her own funeral.

Fagilyu Mukhametzyanov, 49, had been mistakenly declared dead by doctors.

She later woke up in a coffin surrounded by sobbing relatives, at which point she began screaming at the realization that she was about to be buried alive.

Mukhametzyanov, a resident of Kazan, was rushed back to the hospital where she was declared dead a second time. This time, it was sadly legitimate.

Her husband, Fagili Mukhametzyanov, was distraught and stunned.

"Her eyes fluttered and we immediately rushed her back to the hospital but she only lived for another 12 minutes," he recalled in the aftermath.

He told The Sun (UK) that he plans to sue the Kazan hospital.

"I am very angry and want answers," Fagili said. "She wasn't dead when they said she was and they could have saved her life."

A spokesman at the hospital said officials are investigating.