calculated heart weight heart weight to tibia length ratio 2012-11-15T15:35:17Z A calculated value in which the weight of the heart, the chambered, muscular organ that maintains the circulation of the blood, is divided by the length of the tibia, the inner and larger bone of the lower leg or hindlimb, and presented as a ratio, fraction, quotient or percentage, thus normalizing it to the length of the leg and, by extension, to the length of the body. CMO:0001198 JSmith VT:0007028 clinical_measurement_ontology