Final answer:
The 'silent killer' refers to hypertension, which is a major risk factor for heart disease and other serious conditions. Controlling it through lifestyle changes and medications is vital for reducing the risk of heart attack or stroke.
Step-by-step explanation:
The "silent killer" refers to hypertension, which is high blood pressure persistently above the normal range. Hypertension is deemed a silent killer because it typically has no warning signs or symptoms, and many people are not aware they have it. It's a major risk factor for heart disease and can lead to serious health issues such as heart attack, stroke, heart failure, kidney failure, and blindness if not managed. Controlling hypertension involves both medications and lifestyle changes. Steps to reduce one's risk of heart attack or stroke include maintaining a healthy diet, engaging in regular exercise, avoiding tobacco smoke, and managing stress. Medications may also be prescribed to lower blood pressure or to address the buildup of fatty plaques in the arteries, known as atherosclerosis.