ballistocardiograph

noun

bal·​lis·​to·​car·​dio·​graph -ˌgraf 

: a device for measuring the amount of blood passing through the heart in a specified time by recording the recoil movements of the body that result from contraction of the heart muscle in ejecting blood from the ventricles

ballistocardiographic

-ˌkärd-ē-ə-ˈgraf-ik 

adjective

ballistocardiography

-ē-ˈäg-rə-fē 

noun

plural ballistocardiographies