The word Holistic refers to the "whole" system. It is the idea that every level of our being (physical, mental, emotional and spiritual) make up our whole being, each of these levels being interdependent, one upon the other. Holistically speaking, imbalances and weakness in one level can adversely affect the other.
Medium readings can, in a positive way, affect the whole system. During a medium reading we often experience emotional uplifting, mental peace of mind and spiritual re-energizing through validated messages from our crossed over loved ones.
This positive emotional/mental effect can also have a positive impact on our physical well-being. Medium readings can be considered a holistic modality for healing and rebalancing as much as any alternative approach to healing.