Diuretics and RAAS antagonists Flashcards

1
Q

3 goals of HF management with pharmacotherapy

A
  • Reduction of congestion
    • Modulate neurohormonal activation
    • Improve flow
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which diuretics are the most efficacious, why?

A

Loop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which classes of drugs are K+ sparing? Na + sparing? K+ wasting?

A

Na+ sparing = Aldosterone
K+ wasting = Loop and Thiazides
K+ sparing = Aldo-antagonists, ACE-I, and ARB

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In HFrEF acute conditions, which drugs would you use?

A

IV diuresis!!!
Nitrates (if BP allows)
CPAP/BiPAP (if SOB)
Pressors (if ↓↓↓CO, shock

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

In HFpEF acute conditions, which drugs would you use?

A

IV diuresis!!!
Nitrates (if BP allows)
CPAP/BiPAP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Diuretics used to treat what?

A

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)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Are diuretics used chronically or acutely?

A

can be both

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Most common diuretic

A

Furosemide

  • Torsemide or bumetanide have more reliable absorption
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Describe when/how you would initially use ACEIs

A

Started during or after optimization of diuretic therapy at low doses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What do ACEIs produce?

A

Produce vasodilation
↓ aldosterone activation
Plus antiremodeling effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

True/False, ARBs used in conjuction with ACEIs will benefit from the dual therapy

A

NO!

No apparent benefit from dual therapy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What drug is added to therapy for LVEF < 30-35%, optimized on ACEI/ARB and β-blocker therapy

A

Aldosterone Antagonists

- ACEI/ARB aldosterone block is incomplete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what type of aldosterone antagonist is preferred?

A

Spironolactone preferred if tolerated - if endocrine side effects (gynecomastia) can use eplerenone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Diuretic Agents you would be stupid not to know

A
#11: Hydrochlorothiazide
#14: Furosemide (Lasix®)
#70: Spironolactone (Aldactone®)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Nearly all diuretic agents exert their effects at______ surface of renal tubule cells.

A

luminal (urine)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Na+ is the major extracellular cation and its movement between compartments is controlled by regulated active transport via ________ activity at the _______ surface

A

Na+-K+-ATPase

interstitial (blood)

17
Q

Compensatory changes in HF

A

↓ CO →

  1. ↑ Sympathetic discharge
    (baroreceptor response)
  2. ↑ Renin release
    (RAAS response)
  3. Na+ reabsorption → ↑ fluid retention

(remodeling caused by AII can cause chronic harm)

18
Q

Diuretic mechanism of:

thiazides, furosemide, triamterene

A

Interactions with membrane transport proteins

19
Q

Diuretic mechanism of:
(acetazolamide)
or
(spironolactone)

A

Intxn of enzymes (acetazolamide)
or
hormone receptors (spironolactone)

20
Q

Diuretic mechanism of:

Mannitol

A

Osmotic effects preventing water reabsorption

21
Q

True / False, diuretics act via inhibition of Na+-K+-ATPase

A

False

Diuretic agents decrease Na+ reabsorption at various sites in the nephron

22
Q

K+ sparing diuretics do what?
K+ wasting diuretics do what?
- examples

A

K+ sparing diuretics
- decrease K+ excretion in collecting duct
K+ wasting diuretics
- increase K+ excretion in ascending LOH

23
Q

K+ sparing diuretics

- examples

A

Aldosterone antagonists

24
Q

K+ wasting diuretics

- examples

A

Loop agents

Thiazides

25
Q

Loop diuretic examples

  • what do they do?
  • examples
A

Inhibit NaCl transport (Na+-K+-2Cl–transporter)

Furosemide
Bumetanide
Torsemide

26
Q

Loop diuretics Associated with increase in ____and ___ excretion (diminish lumen-positive potential)

A

Mg++, Ca++

27
Q

If Loop diuretics such as Furosemide has a lack of response, what drugs can you switch to?
What about if there is a sulfa allergy?

A

Switch to bumetanide or torsemide –> more reliable bioavailability and longer duration of action

Ethacrynic acid can be used if sulfa allergy

28
Q

Which aldosterone antagonist improves survival in some pts with systolic HF?

A

Spironolactone

29
Q

What type of drug is most efficacious in HF?

A

Loop diuretics