. . . "ballistocardiograph"@en-us . . "0"^^ . "a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles"@en-us . . "0"^^ . "ballistocardiograph"^^ . "cardiograph"@en-us . . . . "102684937"@en-us . . . . "102781764"^^ . "02781764-n"^^ .