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Here are two types of hypertension. Over 90% of cases has no known single cause and therefore is called essential hypertension, primary or idiopathic. It is the suffering the vast majority of patients. In a small group, you can identify a cause, sometimes treatable, responsible for increasing blood pressure levels, it is secondary hypertension, the causes are listed in the table below.
*Hypertension of renal origin
1.Chronic pyelonephritis.
2.Acute or chronic glomerulonephritis.
3.Polycystic kidney disease.
4.Renovascular stenosis.
5.Renin-producing tumors.
6.Unilateral renal disease: segmental atrophy, renal tumor, others …
7.Primary retention of sodium: Liddel syndrome or Gordon.
8.Nephritis of various etiologies.
9.Connective and vasculitis: systemic lupus, scleroderma …
10.Diabetic nephropathy.
* Hypertension of endocrine origin
1. Adrenal cortical hyperfunction (Cushing, primary aldosteronism, primary adrenogenital syndrome …)
2. Medullary hyperfunction adrenal pheochromocytoma
3. Acromegaly
4. Hypo / hyperthyroidism
5. Hypercalcemia
6. Hyperparathyroidism
7. Hemangioendothelioma
8. Extra-adrenal chromaffin tumor
9. Carcinoid Tumor
* Hypertension of psychogenic origin
1. Stress
2. Surgery
3. Severe head injury
4. Serious.
* Neurological Hypertension:
1. Diencephalic syndrome
2. Autonomic nervous system dysfunction.
3. Poliomyelitis
4. Polyneuritis. (Guillain-Barre syndrome, lead poisoning, acute intermittent porphyria)
5. Increased intracranial pressure
6. Section acute spinal cord
7. Sleep apnea.
* Drug-induced Hypertension
1. Sympathomimetics
2. Licorice
3. Interactions Monoamine oxidase inhibitors with tyramine-rich foods (cheese, chocolate, beer …)
4. Tricyclic antidepressants
5. Thallium poisoning.
6. NSAIDs.
7. Corticosteroids
8. Oral contraceptives (estrogen)
9. Cyclosporine A
10. Erythropoietin
* Increased intravascular volume
1. Transfusion
2. Serum therapy
3. Polycythemia.
* Vascular changes
1. Coarctation of aorta
2. Arteriovenous Fistula
3. Aortic insufficiency
* Pregnancy-related hypertension.
* Hypertension-related substances of abuse: alcohol, cocaine …
The JNC VII (Seventh Report of the Joint National Committee on Prevention, Evaluation and Treatment of High Blood Pressure) emphasizes the importance of isolated systolic hypertension, defined as systolic blood pressure greater than or equal to 140 mmHg and diastolic blood pressure <90 mmHg from 60.
Isolated systolic 
If you suffer from 
Although 
When your heart beats, it pumps blood into your arteries and creates pressure in ellas.Dicha pressure is getting the blood to circulate throughout the body.