Role of Pressors in Resuscitation for Treating Hypotension

Indications for Vasopressor Use in Resuscitation

The American Heart Association recommends vasopressors for severe hypotension (systolic blood pressure <70 mmHg) that persists despite adequate fluid resuscitation 3, 4
The American College of Cardiology suggests that vasopressors should be initiated when fluid resuscitation alone fails to restore adequate tissue perfusion, and may be started during fluid resuscitation in severe cases 5
Hemodynamic instability is common after cardiac arrest, with vasodilation occurring from loss of sympathetic tone and metabolic acidosis, according to the American Heart Association 3

The American College of Cardiology strongly recommends norepinephrine (0.1-0.5 mcg/kg/min) as the first-choice vasopressor for most types of shock 1, 2, 5
The Society of Critical Care Medicine recommends norepinephrine for its ability to increase systemic vascular resistance and mean arterial blood pressure while reducing the need for excessive fluid administration 1, 2

The American College of Cardiology recommends that vasopressor therapy should initially target a mean arterial pressure (MAP) of 65 mmHg 1, 2
The Society of Critical Care Medicine suggests that titration should be guided by both arterial pressure and markers of tissue perfusion (lactate clearance, urine output, mental status) 5

The American Heart Association recommends epinephrine (0.1-0.5 mcg/kg/min) as an alternative to norepinephrine when additional support is needed 1, 2
The American College of Cardiology suggests that vasopressin (up to 0.03 U/min) can be added to norepinephrine to either raise MAP or decrease norepinephrine dosage 1, 2
The Society of Critical Care Medicine recommends dopamine (5-10 mcg/kg/min) for highly selected patients with hypotension associated with symptomatic bradycardia or low risk of tachyarrhythmias 1, 2, 6

The American Heart Association states that hemodynamic instability after cardiac arrest is common and associated with poor outcomes 3, 4
The American College of Cardiology recommends norepinephrine for initial management of post-arrest hypotension 3, 4

The Society of Critical Care Medicine suggests that in trauma, vasopressors should only be used if a restricted volume replacement strategy fails to achieve target blood pressure 8
The American College of Surgeons recommends norepinephrine if severe hemorrhage-induced hypotension (systolic BP <80 mmHg) persists despite fluid resuscitation 8

The American Heart Association recommends that vasopressors should ideally be administered through a central venous line to prevent tissue necrosis from extravasation 3, 4, 6
The American College of Cardiology suggests that if extravasation occurs, infiltrate 5-10 mg of phentolamine diluted in 10-15 mL of saline into the site as soon as possible 3, 4

The American Heart Association warns that norepinephrine may increase myocardial oxygen requirements, requiring cautious use in patients with ischemic heart disease 3, 4
The American College of Cardiology notes that norepinephrine can cause renal and mesenteric vasoconstriction, though in sepsis it may actually improve renal blood flow 3, 4

The American Heart Association states that norepinephrine acts primarily on alpha-adrenergic receptors to cause vasoconstriction 3, 4
The American College of Cardiology notes that dobutamine has both alpha and beta effects, with the vasodilating beta-adrenergic effects often counterbalancing the vasoconstricting alpha effects 3, 4