Dorsem Nyingtik (Wyl. rdor sems snying thig), the Heart Essence of Vajrasattva, is a terma revealed by Kunkyong Lingpa and included in the Rinchen Terdzö. According to some sources, such as Katok Rigdzin Tsewang Norbu, it is included in the Nyingtik Yabshyi, the "Four Parts of Nyingtik".
It is said that Guru Rinpoche received the teachings directly from Garab Dorje and transmitted them to Vairotsana. Dorje Lingpa and Kunkyong Lingpa, who were incarnations of Vairotsana revealed the terma, and an identical version was also revealed by Taksham Nüden Dorje, who was an incarnation of Vairotsana's scribe, Labu Dönyö Dé.
- Dezhung Rinpoche, snying thig ya bzhi'i rnam bshad
- Kunsang (2006), p. 340
- Erik Pema Kunsang, Wellsprings of the Great Perfection: Lives and Insights of the Early Masters, Rangjung Yeshe Publications, 2006