Treatment of HTN Flashcards
Types of HTN
Primary HTN Secondary HTN White-coat HTN PseudoHTN Isolated systolic HTN Resistant HTN Hypertensive crises
Define Primary HTN
Unknown cause; due to body’s compensation
90%
Define Secondary HTN
Identifiable cause - disease (CKD), drug (NSAIDs), birth control, etc
Define White-Coat HTN
BP increases in a clinical setting
Define PseudoHTN
BP falsly elevated due to rigid calcified brachial artery
Define Osler’s maneuver
BP cuff inflated above peak SBP, if radial artery remains palpable + Osler’s = PseudoHTN
Define Isolated systolic HTN
Only systolic BP increase
Define resistant HTN
Not at goal BP on max dose of at least 3 drugs, one of which is a diuretic
Define Hypertensive crisis
> 180/120
Emergency or urgency
Define Hypertensive Emergency
Extreme elevation in BP accompanied with acute or progressing target-organ damage
Treatment goals for Hypertensive Emergency
Immediate but gradual decrease in BP with IV agents over minutes to hours (DBP <110)
Define Hypertensive Urgency
High BP without acute or progressing target-organ damage
Hypertensive Urgency treatment
Decrease BP with PO agent to stage 1 values over several hours to days
Automated BP measurment arm cuff
Preferred over manual bc they decrease user error
Arm cuff because finger and wrist are as accurate
Diagnosis from automated BP cuffs
Average of 2 reading taken on separate occasions
Self Monitoring of BP
Should be routine
Useful to guide in diagnosis, response to therapy and improve adherence
- Evaluate white-coat HTN
Diagnosis based on self monitoring
Average readings over 5-7 days
>130/85 is abnormal
Ambulatory BP Monitoring
24 hour monitoring records BP at frequent intervals throughout the day
- Evaluate white-coat HTN
>130/85 is abnormal
BP during sleep
should dip 10-20%, if not may indicated increased risk of CVD
Normal Classification
less than 120/80
Pre-HTN Classification
Systolic: 120-139
AND
Diastolic: 80-89
Stage 1 Classification
Systolic: 140-159
AND
Diastolic: 90-99
Stage 2 Classification
Systolic: >160
AND
Diastolic: >100
Major CV Risk Factors
HTN Obesity >30 Dyslipidemia DM Smoking Physically inactive Albuminuria GFR 55, F: >65) Family history of premature CVD
Identifiable causes of HTN?
Sleep apnea Primary aldosteronism Cushing's syndrome or steroids Drug induced Renovascular disease Pheochromocytoma CKD!!! Thyroid
Baseline Lab test to look at?
Urinalysis (albumin, RBC, WBC), microalbumin:creatinine, hematocrit, fasting lipid panel, Chem 7, calcium, ECG, LFTs
5 Steps of Diagnostic Workup
Assess RF and co-morbidities Reveal identifiable causes Assess presence of target organ damage History and PE Baseline labs
Goals of therapy
Decrease CV and renal morbidity/mortality
Prevent target organ damage
Lifestyle modifications
Who needs lifestyle modifications?
All patients
For stage 1 pts with CV abnormalities (6-12 months)
What kind of lifestyle modifications?
Weight reduction Dash diet Dietary Na restrictions Physical activity Moderate alcohol (<2 per day)
Define DASH diet
Fruits and veggies, low-fat dairy, reduced saturated fat
Define Na restrictions
<1500mg
How much exercise?
30-40 minutes x 3-4 per week
BP Goals for CKD or DM or most patients
<140/90
BP Goal for >80 or 60-80 and frail
Unless CKD or DM
<150/90
Stage 1 HTN Therapy?
MONOtherapy: ACEI, ARB, CCB, or Thiazide
Stage 1 HTN & Black Therapy ?
CCB or Thiazide
Stage 2 HTN Therapy?
Two drugs: Thiazide or CCB + ACEI or ARB
Specifically two drug combo is recommended when?
> 20 mmHg SBP above goal or >10 mmHg DBP
Left Ventricular Dysfunction Treatment
Diuretic + ACEI or ARB then add beta blocker
Add on: aldosterone antagonist
Post-MI treatment
Beta-blocker then add ACEI or ARB
Coronary Artery Disease Treatment
Beta blocker then add ACEI or ARB
Add on: CCB then thiazide diuretic
DM Treatment
ACEI or ARB; ARB, CCB or Thiazide
Add on: CCB or thiazide
CKD Treatment
ACEI or ARB
Recurrent Stroke Prevention Treatment
Thiazide diuretic or thiazide diuretic + ACEI
ALLHAT Conclusions
No difference in primary outcomes or all-cause mortality
ACEI less effective in black pts to decrease BP and CV outcomes
Chlorthalidone was the drug of choice, decreases secondary outcome and least expensive
More than one agent was required to control BP
First Line agents
Thiazide diuretics, ACEI, ARBs, and CCBs
4 Classes of Diuretics
Thiazides
Loop
Potassium-sparing
Aldosterone antagonists
Diuretics MOA
Early BP decrease due to diuresis
Chronic BP decrase due to decreased PVR
Syngergistic on BP with ACEI, ARBs or beta-blockers
1st Gen Thiazides
Chlorathalidone and HCTZ
2nd Gen Thiazide Like
Indapamide (Lozol)
Metolazone (Zaroxoyln)
Thiazide + Renal Dysfunction
1st gens don’t work as well
Thiazide place in treatment?
1st line
Esp in black and elderly
Thiazide side effects
HYPOkalemia HYPOmagnesemia HYPERuricemia Increase Ca reabsorption HYPOtension and dizziness
Thiazide clinical pearls?
Effect decrease with time
Takes 2-3 wks to see max benefit
Chlorthalidone is 1.5X as potent as HCTZ with longer half life
Increase the dose = increase electrolyte problems
Loop diuretics
Furosemide (Lasix)
Torsemide (Demadex)
Bumetanide (Bumex)
Loop diuretics place in treatment
Considered in uncomplicated HTN in patients with significant renal dysfunction not responsive to thiazides
Loop diuretics Clinical pearls
Limited routine use
Biggest roles is in resistant HTN with renal dysfunction
Significant diuresis and electrolyte issues (K and Mg)
Potassium Sparing DIuretics
Amiloride (Midamor)
Amiloride/HCTZ (Moduretic)
Triamterene (Dyrenium)
Triamterene/HCTZ (Dyazide/Maxide)
Potassium Sparing Diuretics Clinical pearls
Weak diuretics
Primarily with thiazides to decrease HYPOkalemia
May cause HYPERkalemia with ACEI/ARBs
Aldosterone Antagonists
Eplerenone (Inspra)
Spironolactone (Aldactone)
Spironolactone/HCTZ (Aldactazide)
Spironolactone is contraindicated in?
When CrCl <30
Eplerenone is contraindicated in?
CrCl less than 50
Elevated SCr greater than 1.8 in F or >2 in M
Type 2DM
Aldosterone Antagonists Clinical Pearls
Potassium sparing
Significant HYPERkalemia esp with ACEI, ARB, or K supplement
What do you monitor with diuretics?
Chem 7
Baseline then 1-2 wks then every 6-12 months or after initiating other agents which may affect electrolytes