Final answer:
Stenosis is a condition in which the heart valves become rigid and interfere with normal heart function. Aortic stenosis affects a significant percentage of the elderly population. In some cases, stenosis can lead to a critical condition requiring immediate surgery.
Step-by-step explanation:
Stenosis is a condition in which the heart valves become rigid and may calcify over time. This loss of flexibility interferes with normal function, causing the heart to work harder to propel blood through the valve and eventually weakening the heart. Aortic stenosis affects approximately 2% of the population over 65 years old, and the percentage increases to about 4% in individuals over 85 years old.
In some cases of stenosis, one or more of the chordae tendineae or the papillary muscle itself may tear or die as a component of a myocardial infarction (heart attack). This can cause a rapid deterioration of the patient's condition, requiring immediate surgical intervention.