A patient has an 80% blockage of his left anterior descending coronary artery. Describe what occurs in terms of myocardial oxygen supply and demand if his sympathetic nervous system is stimulated
What will be an ideal response
When the sympathetic nervous system is stimulated there is increased myocardial contractility, which increases cardiac output and blood flow to active muscles. This increases the demand for oxygen to the cells. The coronary artery is a major blood vessel of the heart. When the demand for myocardial oxygen exceeds the ability of the coronary arteries to supply it, death of myocardial tissue can occur.
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Fill in the blank(s) with correct word