Diuretics and RAAS antagonists Flashcards
3 goals of HF management with pharmacotherapy
- Reduction of congestion
- Modulate neurohormonal activation
- Improve flow
Which diuretics are the most efficacious, why?
Loop
Which classes of drugs are K+ sparing? Na + sparing? K+ wasting?
Na+ sparing = Aldosterone
K+ wasting = Loop and Thiazides
K+ sparing = Aldo-antagonists, ACE-I, and ARB
In HFrEF acute conditions, which drugs would you use?
IV diuresis!!!
Nitrates (if BP allows)
CPAP/BiPAP (if SOB)
Pressors (if ↓↓↓CO, shock
In HFpEF acute conditions, which drugs would you use?
IV diuresis!!!
Nitrates (if BP allows)
CPAP/BiPAP
Diuretics used to treat what?
Volume overload
(SV-Vntricular EDP grap gets moved to left)
Diuretics will: ↑ Salt (+Water) Excretion → ↓ Intravasc Fluid Vol → ↓ Venous congestion → ↓ Dyspnea, Edema
Lowers preload (LVEDP)
Are diuretics used chronically or acutely?
can be both
Most common diuretic
Furosemide
- Torsemide or bumetanide have more reliable absorption
Describe when/how you would initially use ACEIs
Started during or after optimization of diuretic therapy at low doses
What do ACEIs produce?
Produce vasodilation
↓ aldosterone activation
Plus antiremodeling effect
True/False, ARBs used in conjuction with ACEIs will benefit from the dual therapy
NO!
No apparent benefit from dual therapy
What drug is added to therapy for LVEF < 30-35%, optimized on ACEI/ARB and β-blocker therapy
Aldosterone Antagonists
- ACEI/ARB aldosterone block is incomplete
what type of aldosterone antagonist is preferred?
Spironolactone preferred if tolerated - if endocrine side effects (gynecomastia) can use eplerenone
Diuretic Agents you would be stupid not to know
#11: Hydrochlorothiazide #14: Furosemide (Lasix®) #70: Spironolactone (Aldactone®)
Nearly all diuretic agents exert their effects at______ surface of renal tubule cells.
luminal (urine)