Medical Dictionary. arrhythmia. play. noun arÂ·rhythÂ·mia \Ä-Ërith-mÄ-É\. Medical Definition of arrhythmia. : an alteration in rhythm of the heartbeat either in time or force.
Central metabolism provides mechanisms for the generation of energy from carbon-energy source catabolism and the production of biosynthetic precursors and intermediates for the anabolic pathways essential to maintain cell structure and function.
Setup: Sun night, Mon-Sat a.m., night; Report available: Next day. Creatinine is the end-product of Creatine Metabolism. Creatine is present primarily in muscle and the amount of Creatinine produced is related to total skeletal muscle mass. Daily Creatinine production is fairly constant, except when there is massive injury to muscle.