Ralph Marinelli used the indications of Rudolf Steiner in proving that the heart is not a pump. Douglas Gabriel describes how he encouraged Ralph to take on this work from its humble beginnings at the Detroit Waldorf School.
Related articles and videos are:
The Heart is not a Pump: The creator of the video mentions “flat earth“ towards the end. Please disregard this comment as it is not accurate.
Ralph Marinelli’s original paper:
John Barnwell and Douglas Gabriel discuss what it was like to work with Ralph Martinelli
Douglas explains the esoteric anatomy of the heart in this lecture: