Why should there be acute nephritis hypertension?

80% - 90% of acute nephritis patients with hypertension can be shown, is generally mild to moderate hypertension, adults often 130-160/90-110 mmHg (17-21/12-14kpa). Blood pressure volatile, a one-time, occasionally severe hypertension, and with retinal hemorrhage, bleeding, as papillary edema or hypertensive encephalopathy. Produced hypertension reasons: (1) As the result of renal ischemia increased renin: Renin is a special kind of proteolytic enzymes, it can globulin in plasma activity of hypertension without change for the activity of the protein hypertension, hypertension protein produced by the liver change hypertension protein have a very strong role in vascular contraction, so that high blood pressure. (2) As allergy caused by the reflection of the systemic arteries spasm results. (3) Shuinazhuliu, increased blood volume, thereby enabling high blood pressure.