Pressor |
Initial Dose |
Max Dose |
Cardiac Effect |
BP Effect |
Arrhythmias |
Special Notes
|
Dobutamine |
2.5 mcg/kg/min |
10-40 mcg/kg/min |
mainly inotrope (ß1) |
alpha effect minimal |
Some HR(ß1) increase. Also Increase SA and AV node fx |
Debut Research 1979[1] Isoproterenol has most Β2 vasodilatory and Β1 HR effects
|
Dopamine |
2 mcg/kg/min |
20-50 mcg/kg/min |
β1 and NorEpi release |
α effects if > 20mcg/kg/min |
Arrhythmogenic from β1 effects |
More adverse events when used in shock compared to Norepi[2]
|
Epinepherine |
0.1-1 mcg/kg/min |
|
|
|
|
|
Norepinephrine |
8-12 mcg/min |
30 mcg/min |
β1 direct effect |
β1 and α1,2 effects |
Less arrhythmias than Dopamine[2] |
Increases MAP, coronary perfusion pressure, little β2 effects.
|
Milrinone |
50 mcg/kg x 10 min |
0.375-75 mcg/kg/min |
Direct influx of Ca2+ channels |
Smooth muscle vasodilator |
|
PDE Inhibitor which increases Ca2+ uptake by sarcolemma. No venodilatory activity
|
Phenylephrine |
100-180 mcg/min then 40-60 mcg/min |
0.4-9 mcg/kg/min |
|
Alpha agonist |
|
Long half life
|
Vasopressin |
Fixed Dose |
0.4 U/min |
unknown |
increases via ADH peptide |
|
should not be titrated due to ischemic effects
|
Methylene blue[3] |
IV bolus 2 mg/kg over 15 min |
1-2 mg/kg/hour |
Possible increased inotropy, cardiac use of ATP |
Inhibits NO mediated peripheral vasodilation |
|
Don't use in G6PD deficiency, ARDS, pulmonary hypertension
|