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.
The end product of anaerobic metabolism is lactic acid. At physiologic pH ranges in the human body a hydrogen ion quick separates from lactic acid forming lactate. Lactate can then diffuse across cell membranes and into the blood stream. In the laboratory lactate is the compound that is measured in the blood.