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Blood pressure variation in the left ventricle (Blue line) & aorta (Red line) showing the cyclic variations of systolic and diastolic pressure
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Cushing Syndrome
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11β-hydroxysteroid dehydrogenase enzyme mineralocorticoid BP & K +
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vasogenic edema Metabolic Syndrome nephrosclerosis
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o Sedentary lifestyle o Obesity o Insulin resistance o Metabolic syndrome o Aging o Alcohol o Vitamin-D deficiency
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o Low birth-weight o Family history o Genetic o Na+ sensitivity o Sympathetic overactivity o Renin overactivity
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DASH diet: (dietary approaches to stop hypertension) Rich in fruits & vegetables and low-fat or fat-free dairy foods.
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Classification of Hypertension Systolic pressure Diastolic pressure mmHg Normal 90–11960–79 Pre-hypertension 120–13980–89 Stage 1 140–15990–99 Stage 2 ≥160≥100 Isolated systolic HT ≥140<90
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UK Hypertension Guidelines Starting Treatment threshold Group Treatment Target >160/100All those with such persisting readings >160/100.<140/90 >140/90 Have established cardiovascular disease, or Have C.V. Risk (>20% per 10 years), or Have evidence end-organ damage without D.M., or Ch. renal dis., without Macroalbuminuria (or D.M.) <140/90 >130/80Type-2 Diabetes alone.<130/80 >135/85Type-1 Diabetes alone.<130/80 >130/80 Type-1 or 2 Diabetes with microalbuminuria. Type-1 or 2 Diabetes with renal, eye or CV damage. <130/80 >130/80Chronic renal disease with Macroalbuminuria.<125/75
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DIABETIC HYPERTENSION Diabetic Nephropathy with (Microalbuminuria) ACEIs / ARBs. Diabetic Nephropathy with (Macroalbuminuria) ARBs / ACEIs. Diabetic Hypertension without Nephropathy ACEIs / ARBs +/- Thiazide +/- CCBs.
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Definition: [ GFR 60 ml / min / 1.73 m 2 (= serum creatinine 1.5 mg / dL or 1.3 mg / dL ) ] [ Albuminuria 300 mg/day (macroalbuminuria) ]. Treatment Goal: Aggressive BP Lowering 125/75 Compelling Drug: ACEIs or ARBs (Diabetic or non-Diabetic Nephropathy). N.B. GFR ( serum creatinine) up to 35% from baseline is acceptable, And is NOT a reason to withhold treatment unless hyperkalemia develops. In Advanced Renal Disease: [ = GFR 30 ml / min / 1.73 m 2 (serum creatinine 2.5 - 3mg / dL) ] : Increasing dose of loop diuretic is usually needed with ARBs or ACEIs) CHRONIC RENAL DISEASE
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HEART FAILURE Asymptomatic HF ACEIs / ARBs + BBs. Advanced HF ACEIs / ARBs + BBs + Diuretic.
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CEREBRO-VASCULAR STROKE Risks & Benefits of ACUTE Lowering of BP DURING acute CV Stroke are still unclear. Control of BP at intermediate levels (approximately 160/100 mmHg) is appropriate until condition is stabilized or improved. Stroke rates are lowered better by ACEIs / ARBs + Thiazide.
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ISCHEMIC HEART DISEASE Asymptomatic Angina: BBs or CCBs Symptomatic Angina: ACE-Is / ARBs (ARBs in Patients can’t tolerate ACE-Is) Acute MI (elevated ST segment) : ACE-Is / ARBs + BBs (ARBs in Patients can’t tolerate ACE-Is) N.B. CCBs if given there should be extreme cautious to avoid heart failure.
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AA, aldosterone antagonist; ACEI, angiotensin-converting enzyme inhibitor; ARB, angiotensin II-receptor blocker; βB, ß-blocker; CCB, calcium channel blocker; MI, myocardial infarction; CAD, coronary artery disease. JAMA. 2004;289(19):2560-2572. Compelling Indications Diuretic ßBßBßBßBACEIARBCCBAA Heart failure Post-MI High CAD risk Diabetes Chronic kidney disease Recurrent stroke prevention
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The Use of Diuretics Require Electrolyte & Acid-base Balance Monitoring
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Osmotic mannitol glucose furosemide HCT chlortalidone spironolactone CAI acetazolamide
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Adverse EffectType of DiureticsExampleClinical Effect HypovolemiaLoop Diuretic Thiazide Lasix HCT 25 mg/day Hypotension Thirst GFR HypokalemiaLoop Diuretic Thiazide Carbonic Anhydrase Inhibitor Lasix HCT 25 mg/day Acetazolamide Muscle weakness Cardiac arrhythmia HyperkalemiaPotassium Sparing DiureticsSpironolactoneMuscle Cramps Cardiac arrhythmia HyponatremiaLoop Diuretic Thiazide Lasix HCT 25 mg/day Neurological manifestations Metabolic AlkalosisLoop Diuretic Thiazide Lasix HCT 25 mg/day CNS manifestations Cardiac arrhythmia Metabolic AcidosisPotassium Sparing Diuretics CAI Amilorides – triamterene Acetazolamide muscle weakness neurological symptoms seizures Decrease Ca++ ExcretionThiazideHCTPrevents Osteoporosis Prevents Renal calculi HyperuricemiaLoop DiureticLasixGout
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α-adrenergic receptors are present in the smooth muscles e.g. prostate, arteries & veins. α 1 -adrenergic stimulation smooth muscles contraction vasoconstriction. α 1 -adrenergic blockers Relaxing vascular smooth muscles vasodilatation vascular resistance hypotension. α 1 -adrenergic blockers Relaxing prostate & U.B. neck.
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o β 2 : Bronchodilation. Vasodilatation. Affect Glycogen Breakdown in Liver & Skeletal muscles o β 3 : Lipolysis. Renin Release BP. Stimulation of β -adrenergic Receptors: o β 1 : +ve Chronotropic on heart muscle. +ve Inotropic on heart muscle.
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o Management of cardiac arrhythmias o Antihypertensive.
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Other Side Effects of β -blockers : o Hyperkalemia. o Erectile dysfunction. o Bradicardia, heart failure, heart block. o Hypotension, orthostatic hypotension. o Tremors. o Insomnia
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Mode of Action : Disrupt the calcium ions (Ca +2 ) transport at calcium channels: o In vascular smooth muscles o In cardiac muscle INDICATIONS : o Hypertension o Atrial flutter & AF o Angina
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o At high doses CCBs block the effect of insulin.
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Glomerular Corpuscle Juxta glomerular cells macula densa Afferent arteriole Efferent arteriole Distal convoluted tubule Urinary chamber Bowman’s capsule Basement membrane - Podocytes Proximal convoluted tubule Urinary excretion: Fluid & electrolyte filtration from capillary side to urinary side through the basement membrane & podocytes to the urinary chamber of the glomerulus.
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Direct Na + H 2 O retention water retention Blood
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Direct Na + H 2 O retention water retention
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Direct Na + H 2 O retention water retention
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Direct Na + H 2 O retention water retention Blood water retention
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Magdi El-ShalakanyMagdi El-Shalakany Mean Arterial Pressure (mm Hg) Intraglomerular Pressure Chronic hypertension with chronic renal disease Chronic hypertension Normal Low High 8012016018014010060 with normal renal function
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smooth muscle cells
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1.Hypertension 2. IGP 3.Renal Hyperfiltration 4.Renal Tissue injury 5.Structural & Morphological Changes : Mesangial tissue expansion Basement membrane thickening Podocyte pedicles’ detachment Intraglomerular Fibrosis 1. BP 2. IGP 3. Renal t. injury 4. GFR 5.Bradykinin S.E: Persist Dry Cough Inflammation symp Angio-edema 6.Tolerance Degradation
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1. Hypertension 2. Left Ventricular remodeling (CHF) 3. IGP 4.Renal Hyper-filtration 5.Renal Tissue injury Chronic renal disease 6.Structural & Morphological Changes : o Mesangial tissue expansion o Basement membrane thickening o Podocytes pedicles’ detachment o Intraglomerular Fibrosis
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1. BP 2. sympathetic tone peripheral resistance 3. Na + & water retention blood volume 4. sympathetic tone HR 5. COP & Heart work load & O 2 consumption 1. Hypertension 2. Heart Failure 3. Angina 4. Post myocardial infarction
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6. Intra-Glomerular Pressure ( IGP) 7. Renal Hyper-filtration 8. Renal Tissue injury 9.Improve functional & structural renal condition 10. Structural & Morphological Changes 11. micro & macro-albuminuria 5. Diabetic Nephropathy 6. Chronic renal disease
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1. Bradykinin & inflammatory related S.E: o Persistent Dry Cough o Angio-edema o Rash o Inflammation-related Pain 2. GFR Creatinine Clearance Rate (Ccr or C C ) serum Creatinine GFR ( serum creatinine) up to 35% from baseline is acceptable & is NOT a reason to withhold treatment unless hyperkalemia develops. 3.Hyperkalemia 4.Metallic Taste (sulfhydryl part in Captopril molecule)
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1.Renal artery stenosis (bilateral) 2.Renal artery stenosis (Unilateral) 3.Impaired renal function (ACE-Is may GFR). 4.Aortic valve stenosis or cardiac outflow obstruction (ACE-I COP). 5.Hypovolemia or dehydration (ACE-Is diuresis ( fluid volume) & BP). 6.Pregnancy (category D)
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1.Hypertension 2. IGP 3.Renal Hyperfiltration 4.Renal Tissue injury 5.Structural & Morphological Changes : Mesangial tissue expansion Basement membrane thickening Podocyte pedicles’ detachment Intraglomerular Fibrosis 1. BP 2. IGP 3. Renal t. injury 4. GFR C Cr 5.Bradykinin S.E: Persist Dry Cough Inflammatory symptoms Angio-edema 6.Tolerance Degradation
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1. No Bradykinin & inflammatory related S.E: o Persistent Dry Cough o Angio-edema o Rash o Inflammation-related Pain 2.ARBs prevent excessive GFR Creatinine Clearance Rate which serum creatinine. It Keeps the Drop in GFR & C cr (if occur) 35% from baseline which is acceptable & So No Need to Withhold treatment. 3.No Decline of Anti-Hypertensive Effect 4. No Metallic Taste (sulfhydryl part in Captopril molecule)
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Diuretics α-blockers β-blockers CCBs ACE-Is/ARBs
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-blockers -blockers Calcium antagonists AT 1 -receptor blockers Diuretics ACE inhibitors ESH Guidelines. J Hypertens. 2007;25:1105-1087. ESH= European Society of Hypertension
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o CRD = Chronic Renal Disease. o GFR = Glomerular Filtration Rate. o BUN = Blood Urea Nitrogen = Uremia = Azotemia. o ESRD = End Stage Renal Disease (= Need for Dialysis or Kidney Transplant)
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o Plasma concentrations of creatinine and urea ( BUN = Blood Urea Nitrogen) are used to measure renal function. o Creatinine clearance rate ( C Cr or Cr Cl): “A measure for GFR”. o BUN and serum creatinine will not be raised normal Until 60% of total kidney function is lost. o Creatinine clearance ( C Cr or Cr Cl) is then more accurate to measure suspected renal disease.
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o Proteinuria (elevated level of protein (albumin) in urine) : It is an important Prognostic marker for renal disease. o Albumin level 30 mg/24 hr urine is diagnostic for chronic kidney disease o Microalbuminuria is a level of 30-300 mg/24 hr urine; (can not be detected by usual urine dipstick methods). o Macroalbuminuria is a level 300 mg/24 hr urine.
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1. In patients 50 yr : SBP ( 140 mmHg) is much more important Risk Factor for CVD than DBP. 2. CVD Risk doubles with each increment of 20/10 mmHg (above normal). 3. Pre-hypertensive patients (SBP 120-139 / DBP 80-89) Require Lifestyle modifications to CV Risk.
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4. Thiazide diuretic is drug of First choice for most patients with uncomplicated hypertension. 5. Certain Risk conditions are Compelling Indications For Other Anti-hypertensive Agents (e.g. ACE-Is, ARBs, CCBs, BBs …. etc) 6. Most hypertensive patients will require 2 or more antihypertensive agents to Achieve Treatment Goals: ( 140/90 mmHg, or 130/80 mmHg for Diabetic or Chronic Renal disease patients ) 7. If BP is 20/10 mmHg above Goal, consider additional agent therapy, one of which should be thiazide.
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8.Empathy & Motivating Patients are very important to reach Treatment Goal. 9.Responsible Physician’s Judgment remains paramount in the presence of these guidelines.
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