Pathophysiology
   Progression of essential hypertension.
   Progression of renovascular disease.
       Acute Glomerulonephritis
       Scleroderma
       Pre-Eclampsia
   Endo: Cushing's disease, Pheochromocytoma.
   Meds: Cocaine, Amphetamines, MAOi + tyramine.

 Treatment     
   Monitor: UOP, Cr, mental status - deterioration my indicate higher GOAL BP.
   Hypertensive Emergency:
        Step 1:  Within 2 hrs or faster if tolerate: Decrease MAP by 25%
        Step 2:  In 2-6 hours attain a GOAL: DBP < 110
    Hypertensive Urgency:
        Step 1: Within a few hours decrease BP with oral meds.
        Step 2: Attain GOAL: 1 - 2 days.
   IV Agents: Nitroprusside (*cyanide), Nitroglycerin, Labetolol, Hydralazine,                     Esmolol, Fenoldopam, Nicardipine, Phentolamine
   PO Agents: Captopril, Labetolol, Clonidine, Hydralazine
   
   Cerebral Injury:  Treat BP only in the following circumstances:
      Thrombolysis, BP > 220/120, Ao dissection, Active ischemia, CHF
  
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