India, May 14 -- Prateek Yadav, the younger son of Samajwadi Party founder Mulayam Singh Yadav, died at the age of 38 after falling ill with cardiac-lung complications early Wednesday. His death has shocked political circles across Uttar Pradesh. Prateek had been battling deep vein thrombosis (DVT), pulmonary embolism and recent cardiac complications, a senior doctor who treated him said on Wednesday.

The provisional post-mortem report prepared at the King George's Medical University (KGMU) earlier in the day cited the cause of death as "cardiorespiratory collapse due to massive pulmonary thromboembolism", a condition in which a large blood clot blocks arteries in the lungs, leading to sudden heart and lung failure.

"He was my old follo...