HTN Flashcards
How do you treat primary HTN?
Medically managed, cannot be attributed to another cause
How do you treat secondary HTN?
- Treat underlying diseases (primary aldosteronism, obstructive sleep apnea etc.)
- Remove any medications causing HTN if possible (ex: SNRIs, TCA & MAIOs)
Stage 1 HTN BP readings:
130-139/80-89 mm Hg
Stage 2 HTN BP readings:
> 140/>90 mm Hg
Hypertensive crisis BP readings:
> 180/>120 mm Hg
Black patients with HTN but NO CKD or HF should be treated with which first line class(es) of anti-HTN?
Thiazide-type diuretics OR CCB
(ACEi/ARB don’t work as well!)
Safe anti-HTN in pregnant patients (3)
- Labetalol
- Nifedipine ER
- Methyldopa
Beta blockers to be used in pts with HTN and indication of HFrEF? (3)
- Carvedilol
- Metoprolol succinate
- Bisoprolol
Chlorthalidone (Hydroton) Dosing?
12.5-25 mg Daily
Hydrochlorothiazide (Hydrodiuril) Dosing?
25-50 mg Daily
Thiazide and thiazide-like diuretic mechanism of action
Inhibits Na and Cl reabsorption in the distal convoluted tubule leading to increased excretion of Na, Cl, H2O, and K
Thiazide and thiazide-like diuretic monitoring
Electrolyte and renal function 2-4 weeks after initiating or changing therapy
Adverse Effects of Thiazide diuretics?
Hyper: Calcemia, uricermia, glycemia
Hypo: volemia, natremia, kalemia, magnesemia
Major DDI for NON-DHP CCBs?
CYP3A4 (Adjust dose for simvastatin and lovastatin)
Amlodipine (Norvasc) Dose?
2.5-10mg Daily (DHP)
Nifedipine ER (Procardia) Dose?
30-120 mg Daily (DHP)
Diltiazem ER (Cardizem) Dose?
120-360mg Daily (Non-DHP)
ACEi contraindications?
- Pregnancy
- Angioedema history
- Bilateral renal artery stenosis
ACEi and ARBs major adverse effect
Hyperkalemia
Lisinopril (Prinivil/Zestril) dosing
10-40 mg Daily
Losartan (Cozar) dosing?
50-100 mg in 1-2 divided doses
Valsartan (Diovan) dosing?
80-320 mg daily
Direct Renin Inhibitor (DRI) adverse effects
Hyperkalemia
Aliskiren (Tekturna) dosing?
150-300 mg daily
Beta Blockers adverse effects
Bradycardia, Bronchospasm, heart block, worsening HF
What must be done when discontinuing a beta blocker?
Taper down dose
Metoprolol Succinate (Toprolol XL) dose
50-200mg daily (cardioselective)
Bisoprolol (Zebeta) dose
2.5-10mg daily (cardioselective-)
Carvedilol (coreg) dose
12.5-50mg over two divided doses (alpha and beta blockade)
Thiazide and thiazide-like use in patients with gout
OK if uric acid is within normal range, avoid is uric acid elevated
DHP CCB Mechanism of Action
Inhibits Ca ions from entering vascular smooth muscle and myocardial cells leading to peripheral arterial and coronary artery vasodilation
Non-DHP CCB Mechanism of Action
Inhibits Ca ions from entering vascular smooth muscle and myocardial cells (more selective for the myocardium) leading to vasodilation, negative inotropy, and negative chronotropy
ACEi mechanism of action
Decreases angiotensin-II production leading to vasodilation and decreased aldosterone secretion
ARB mechanism of action
Blocks angiotensin-II activity at the angiotensin receptor n vascular smooth muscle preventing vasoconstriction
DHP CCB onset of action
Up to one week to see the full BP effect
DHP CCB that should be avoided in HTN
Nifedipine IR - increased hypotension, MI, and death!
DHP CCB AE
Peripheral edema, headache, dizziness
Non-DHP CCB should be avoided in which disease state?
HFrEF
Which class of drugs requires a wash-out before ANRI (Entresto) initiation, and for how long?
ACEi - 36 hours
Does NOT apply to ARBs
Serum creatinine increase EXPECTED with ACEI/ARB?
Less than or equal to 35%
Direct renin inhibitor mechanism of action
Inhibits renin leading to an overall decrease in angiotensin II
Beta-blocker mechanism of action
Inhibits B1/B2 receptors leading to a decrease in inotropy and chronotropy
Alpha1-blocker mechanism of action
Blocks alpha-1 adrenergic receptors leading to peripheral vasodilation
Central Alpha-2 agonist mechanism of action
Stimulates central alpha2 adrenergic receptors leading to a decrease in sympathetic outflow (norepinephrine), leading to vasodilation and decrease inotropy/chronotropy
Loop diuretic mechanism of action
Inhibits Na, K, Cl reabsorption in the thick ascending loop of henle
Potassium sparing diuretic mechanism of action
Competitive inhibition of epithelial sodium channels in the collecting duct of the nephron, leading to a decrease in sodium reabsorption and increase in potassium reabsorption
Mineralocorticoid receptor antagonist mechanism of action
Competitive antagonist of the mineralocorticoid receptor which decreases reabsorption of Na and increases reabsorption of K
Eplerenone = selective
Spironolactone = non-selective
Direct vasodilators
Direct vasodilation of arteries
Alpha1 blocker adverse effects
Syncope, orthostatic hypotension
Doxazosin (Cardura) dose
1-16 mg daily
Central alpha2-agonists method of discontinuation
Slow taper to avoid rebound hypertension
MRA adverse effects
Spironolactone: gynecomastia, breast tenderness, impotence - if these occur, switch to eplerenone!
Which anti-hypertensives require renal/electrolyte monitoring in 2-4 weeks after initiation? (6)
- ACEi/ARB
- Thiazides and thiazide-type diuretics
- Direct renin inhibitors
- Loop diuretics
- Potassium sparing diuretics
- Mineralocorticoid receptor antagonists
What is a normal blood pressure?
< 120 / < 80 mm Hg
What is an elevated BP?
120-129/ < 80 mm Hg
What is the general blood pressure goal for patients?
< 130/80 mm Hg
What occurs in HTN emergency that does not occur in HTN urgency?
End organ damage! Look for things like elevated SCr, LFTs, etc!
Treatment approach for HTN urgency
Timing: Lower BP slowly in 24-48 hours of presentation
Agent: ORAL anti-HTN
Location: No ICU