01 - Heart Failure Drugs
- Digoxin, milrinone, nesiritide
- ACE Inhibitors, ARBs, Aliskiren
Others: dobutamine, β-blockersDigoxin, milrinone, nesiritide
Digoxin
Inhibition
of Na+/K+
ATPase
ATPase ↑ intracellular
...
01 - Heart Failure Drugs
- Digoxin, milrinone, nesiritide
- ACE Inhibitors, ARBs, Aliskiren
Others: dobutamine, β-blockersDigoxin, milrinone, nesiritide
Digoxin
Inhibition
of Na+/K+
ATPase
ATPase ↑ intracellular Na
↑ Na → Ca influx by
Na+/Ca2+ exchanger
↑SR Ca stores →
(+)inotropic
For chronic
systolic HF
symptoms
Direct stimulation
of vagus n.
S/E: hyperkalemia
S/E: induce
arrhythmias
S/E: chronic use
→ “scooped”
concave ST
segments
S/E: ↑PS on
SA node →
bradycardia
S/E: ↑PS on
AV node →
heart block
C/I in heart block,
e.g. w/ β-blockers
S/E: nausea,
vomiting,
abd. pain
S/E: neurological
and xanthopsia
(see yellow)
C/I w/ hypokalemia →
exacerbates
toxicity
C/I w/ renal
insufficiency →
↑ serum half-life
C/I w/ antiarrhythmics → ↓ renal clearance
e.g. amiodarone, verapamil, diltiazem, quinidine
Anti-digoxin Fab
Ab for toxicity
Milrinone
Inhibits
PDE
↑cAMP
(+)inotropic
Dilates a.
→ ↓afterload
Nesiritide
Synthetic BNP
→ ↑ cGMP
Dilates a/v.
→ ↓pre-/
after-load
S/E: ↓Na
For atrial arrhythmiasACE inhibitors, ARBs,
Aliskiren
Renin
JGA secretes renin
Angiotensinogen
→ Angiotensin I
ACE in
lungs
Angiotensin I → AT-II by ACE in lungs AT-II causes vasoconstriction → ↑TPR
AT-II constricts
efferent a. →
↑GFR
AT-II ↑NaHCO3
reabsorption
at PCT
AT-II
↑aldosterone
from adrenal
cortex
Aldosterone
↑Na and H2O
retention &
↓K at collecting
duct
-pril
suffix
ACE inhibitor
Blocks
AT-I → AT-II
Reverse ALL
the effects
of AT-II
↑ creatinine
S/E: hypotension
and syncope
S/E: ↓aldosterone
→ hyperkalemia
↑AT-I
and renin
1° for HF
Reduce
mortality in
HF & MI
↓AT-II mediated
LV remodeling
For acute
MI
1° for
hypertension
↓ progression
of diabetic
nephropathy
For pts w/
albuminuria and
BP >130/80
S/E: dry
cough d/t
↑bradykinin
C/I in hereditary
angioedema
(↓C1es inhibitor)
C/I in
pregnancy
C/I w/ NSAIDs
→ acute
renal
injury
C/I in renal a.
stenosis
AT rec.
blockers
(ARBs)
-sartan
suffix
S/E: hyperkalemia
No dry cough
Aliskiren
Direct renin inh.
S/E: hyperkalemia
↑Cr02 - Diuretics
- Acetazolamide, mannitol
- Loop diuretics (furosemide, ethacrynic acid)
- Thiazides (hydrochlorothiazide, chlorthalidone)
- K+ sparing diuretics (amiloride, triamterene,
eplerenone, spironolactone)
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