myocardial oxygen demand

Myocardial oxygen demand refers to the amount of oxygen the heart muscle requires to function effectively. The heart needs oxygen to generate the energy needed for each beat. Factors influencing this demand include heart rate (how fast it beats), contractility (how strongly it contracts), and wall tension (pressure within the heart walls). When demand exceeds the oxygen supply, it can lead to chest pain or a heart attack. Understanding this balance helps in managing conditions like angina and ensures the heart gets enough oxygen to meet its work requirements.