The 75-year-old director-cum-producer-cum-actor Dasari Narayana Rao passed away on Tuesday evening while undergoing treatment at KIMS Hospital in Hyderabad. According to the endoscopy reports, the director sustained a little injury in his vocal cord and it led to infection. Following a surgery, Dasari Narayana Rao recovered but once again due to infection, his lungs have been affected. Doctors have also performed a surgery taking a small section from his large intestine and placed it on the injured part of the vocal cord by means of surgery. But it could not be successful for a long run. The director was put on ventilators and subsequently, it affected his Kidneys due to low blood pressure. This resulted in a heart attack. Watch the video.