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4. Increase in blood pressure
It is a traitor opposed to a specific disease
and represent a quantitative rather than a
qualitative deviation from the norm, hence
any definition is arbitrary
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7. Idiopathic
40-60% is genetic factor
High salt intake
Heavy consumption of alcohol
Obesity
Lack of exercise
Impaired intrauterine growth
Stress
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11. Target organ disease
Blood vessels
Central nervous system
Retina
Heart
Kidneys
Malignant or
accelerated phase hypertension
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15. Central nervous system
Stroke due to cerebral hemorrhage or infarction
Carotid atheroma & transient cerebral ischemia attacks
are common
Subarachnoid haemorrhage
Symptoms are
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Disturbance of speech or vision
Paraesthesia
Disorientation
Fits & loss of consiousness
Neurologial deficit is usually reversible if the
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hypertension is controlled
16. Retina
Central retinal vein thrombosis occurs
Micro aneurysm also occurs
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17. Heart
High blood pressure
Left ventricular hypertrophy
(atrial fibrillation)
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Left ventricular failure
19. Malignant or accelerated phase
hypertension
This rare condition may complicate
hypertension of etiology and is
characterized by damage with necrosis in
the walls of small arteries & arterioles
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21. Investigations for all patients
Urine analysis for blood, protein and
glucose
Blood urea, electrolyte, and creatinine
Blood glucose
Serum total and high density lipoprotien
12 lead ECG
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22. Investigations for selected patients
Chest radiograph
Ambulatory BP recording
Echocardiogram
Renal ultrasound
Renal angiography
Urinary catecholamines
Urinary corstiol and dexamethasone supressing
test
Plasma renin activity and aldosterone
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31. Management guidelines
Untreated mild or moderate hypertension
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–
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Diastolic- 90-110 mg hg
Bp should be monitored
Medication should be used pre and post
operatively
Controlled hypertnsion
– Therapy should be maintained untill the night
before surgery
– Medication to be known to anaesthesiologist
– Potassium preoperative to be given
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32. Moderate to severe hypertension
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–
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Diastolic greater than 110mm hg
Rapidly acting agents can be given
Emergency- nitriprusside or nitroglycerine
I.v methydopa or diazoxide
Oral prazosin or clonidine
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33. General anesthesia
Contraindications
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–
–
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Severe hypertension
Cardiac failure
Coronary / cerebral artery insufficiency
Renal insufficieny
Best treated under LA
Diuretics should be stopped before
surgery
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