Increase migration of calcium in to muscle cells that contributes to arterial muscle contraction and causes constriction of arteries in turn. The higher the pressure more the deposits will occur. Subsequently these deposits become calcified due to fibrous growth and involved arteries lose their elasticity. It prevents blood from flowing easily and may lead to clotting. The clot formation can suddenly choke off the blood supply and lead to a heart attack, stroke or kidney failure.
Hypertensives are more prone to suffer strokes than person having normal pressure.
Hypertension burdens left ventricle, and left ventricle enlarges due to over load. These enlarge heart muscles need more oxygenated blood supply. At the same time thicken coronary arteries may limit blood supply to the heart muscles. As a result the heart muscle may be weakened and develop scarring. The weaken left ventricle cannot pump out enough blood to supply the body s need.