Vishnu Granthi Yantra - High Quality Print of Artwork by Pieter WeltevredeGranthi refers to the knots in the subtle body, blocking the flow of prana (life energy) through the Sushumna nadi, the central psychic channel. These knots hinder the Yogis progress toward spiritual enlightenment and liberation. There are three main Granthis: Brahma Granthi, Vishnu Granthi, and Rudra Granthi, each causing an obstruction at different energy centers in the body. Vishnu Granthi is governed by the Anahata (heart) and Vishuddha (throat)