How can hypertension leads to heart failure or to stroke? -

It is because the loss of elasticity in the vascular walls prevents the high pulse pressures originating within the left ventricle of the heart, (but transmitted into the aorta and other large arteries,) being absorbed and attenuated by expansion. So, instead of being absorbed, and reduced in strength, these high pressures are able to be transmitted further and further down the arterial tree and extend well into the arteriolar bed and beyond, - even into the capillaries. These smaller blood vessels are not able to withstand the higher pressures and so are vulnerable to rupture. That is the real mechanism. In reality, the heart does NOT develop higher pressures, as posted by your other Answers. Everyone s cardiac pressures are in fact all very much the same, - quite contrary to orthodox medical thinking.

In terms of stroke/heartattack, high blood pressure leads to vascular damage over time, which along with other mechanisms causes sclerotic vessels, and eventual thrombus (clots) leading to strokes/heart attacks As well, the effort by the left side of the heart to maintain high pressures causes the muscular wall to become big and bulky. Unfortunately this does not equate to a stronger heart but actually a weaker one (very stiff), and this eventually leads to heart failure.

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