heart weight to body weight ratio heart weight as percentage of body weight A calculated value in which the weight of the heart, the chambered, muscular organ in vertebrates that pumps blood received from the veins into the arteries, thereby maintaining the flow of blood through the entire circulatory system, is presented as percentage of the total weight of the body, thus normalizing it to body weight. CMO:0000075 Term merged into CMO:0000074, heart weight to body weight ratio clinical_measurement_ontology true