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Hypertensive Nephropathy

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How Is High Blood Pressure Linked to Kidney Damage

How Is High Blood Pressure Linked to Kidney DamageHow is high blood pressure linked to kidney damage? We may find almost all the kidney disease patients have elevated blood pressure and also they are all asked to control their blood pressure in normal range tightly. Why is this? Is there any link between high blood pressure and kidney damage?

Actually, high blood pressure interact with kidney damage. That is to say:

-High blood pressure can cause kidney damage

High blood pressure is also called hypertension which refers to high impact of bloodstream on blood vessels. Our blood vessels are elastic, so temporary high blood pressure and slightly elevated blood pressure is not so dangerous. However, if blood pressure keeps being high, blood vessels will be finally damaged.

Our kidney is a natural filter of our body. It filters our blood and thereby clearing harmful substances away from our body. Our kidney is full of big and small blood vessels. When these renal blood vessels are damaged due to years of high blood pressure, kidneys can not function properly, which presents as decline of kidney function. According to clinical study, people with hypertension over 10 years run very high risk for kidney damage. Kidney problem caused by high blood pressure is called Hypertensive Nephropathy which is the second cause of dialysis nowadays.

-Kidney damage can cause high blood pressure as well

Our kidneys play multiple role in our body. They not only cleanse blood, but also maintain electrolyte balance and regulate blood pressure. When kidney structure is damaged, kidneys will release a substance named rennin which can increase activity of Angiotensin II. Angiotensin II shrink blood vessels, leading to elevation of blood pressure. Besides, rennin and angiotensin II increases aldosterone in our body, thereby causing water and sodium retention. This aggravates high blood pressure as well. In medicine, high blood pressure caused by kidney disease is called renal hypertension.

High blood pressure has close relationship with kidney disease. In reality, when one is found to have high blood pressure and kidney disease, it is important to find out the real relationship between them. But no matter kidney damage is caused by high blood pressure, or high blood pressure is caused by kidney damage, it is of great importance to control blood pressure in normal range.

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