How do the kidney and vascular diseases contribute to hypertension?

Renin-Aldosterone. Entire medical books have been written on this mechanism of action. Basically when the kidney has a blockage in the arteries leading to it it perceives a low blood pressure. Since the kidney has the ability to release a chemical signal that tells the body to increase blood pressure it does just that. The problem is is that blood pressure is increased throughout the entire body, not just the kidney, and can have adverse effects.
Other way. It is hypertension that causes these problems and of course if it is not controlled well it could may these disease worse.
Hormonal. The kidneys are a pivotal component of blood pressure control with multiple mechanisms that can elevate the blood pressure. Disease of the kidneys themselves can induce release of hormones that raise the blood pressure. The arteries that feed the kidneys can have partial blockages that cause the kidneys to secrete hormones to raise the bp. Glands that are adjacent can also release BP hormones.

Related Questions

How do the kidney and vascular diseases connect to hypertension?

Renovascular HTN. A condition called renovascular hypertension arises when blood flow to the kidney is constricted--either by physical problems with the blood vessel wall or by narrowing in the case of hardening of the arteries (atherosclerosis). Decreased blood flow to the kidney results in hormonal signals from the kidney that increase salt and water retention, leading to high blood pressure states. Read more...