MYOCARDIAL METABOLISM
The heart uses ATP, created by metabolism of carbohydrates or fatty acids, to derive energy for contraction and electrical activity. Energy for electrical activity is minimal compared to that required for contraction. Stored energy reserves are scarce, and the heart must continually have a source of energy in order to function. The principal oxidative substrate for ATP production is fatty acid, but if it is not available, a variety of carbohydrates can be used. Myocardial metabolism is aerobic, and a constant supply of oxygen must be available. The heart, unlike skeletal muscle, is unable to acquire an “oxygen debt” because of its inability to utilize anaerobic metabolism.
Tags: anaerobic metabolism, atp production, contraction, electrical activity, energy reserves, fatty acid, fatty acids, heart, metabolism of carbohydrates, oxygen debt, prin, source of energy, substrate
- CIRCULATORY PHYSIOLOGY
- ELECTRICAL CONDUCTION SYSTEM
- CARDIAC DEVELOPMENT
- PHYSIOLOGY OF THE CORONARY CIRCULATION
- ACQUIRED DISORDERS OF PLATELET FUNCTIOII
- PHYSIOLOGY OF THE PULMONARY CIRCULATION
- CARDIOVASCULAR RESPONSE TO EXERCISE
- GROSS ANATOMY
- PHYSIOLOGY OF THE SYSTEMIC CIRCULATION
- MICROSCOPIC ANATOMY
- CARDIOVASCULAR PHYSIOLOGY DURING PREGNANCY - ELECTROPHYSIOLOGY
- MYOCARDIAL METABOLISM
- QUALITATIVE PLATELET DISORDERS