TIRUPATI: Tirumala Tirupati Devasthanams (TTD) Agama advisor NAK Sundara Vadana Bhattacharyulu died of cardiac arrest in Nellore on Tuesday night. He was 85. Bhattacharyulu attended the Gudi Ko Gau Mata programme launched by TTD chairman YV Subba Reddy within the morning. After the programme, he complained of sickness and was rushed to a hospital. Bhattacharyulu was within the Agama Advisory Board since 2006. He was additionally the chief advisor of the Tirumala temple.