The bigger your heart is, the more it demands oxygen-rich blood but the less able it is to maintain proper blood flow. Like any heavily exercised muscle in your body, your heart grows bigger (enlarges) to handle the extra workload. Enlarged heart. High blood pressure increases the amount of work for your heart.A heart attack or stroke can occur if a blood clot blocks blood flow to your heart or brain. Hardening of the arteries. Pressure inside your arteries can cause the muscles that line the walls of the arteries to thicken, thus narrowing the passage.High blood pressure can affect your health in four main ways: As these arterioles tighten (or constrict), your heart has to work harder to pump blood through the smaller space, and the pressure inside the vessels grows. Arterioles regulate the blood flow through your body.
High blood pressure results from the tightening of very small arteries called arterioles. The moving blood pushes against the arterial walls, and this force is measured as blood pressure.
Your heart pumps blood through a network of arteries, veins, and capillaries.
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