Hypotension Treatment Guidelines

Initial Assessment and Cause-Directed Treatment

The British Journal of Anaesthesia recommends that hypotension treatment must be immediately directed at the underlying cause—vasodilation, hypovolaemia, bradycardia, or low cardiac output—rather than empirically administering fluids, as only approximately 50% of hypotensive patients are fluid-responsive 1
The most critical first step is determining which physiological derangement is causing hypotension, as treatment differs fundamentally based on etiology, according to the British Journal of Anaesthesia 1
For patients with hypovolaemia, the British Journal of Anaesthesia recommends treatment with intravascular fluid administration (crystalloid, colloid, or blood products) 1
For patients with bradycardia, the British Journal of Anaesthesia recommends treatment with anticholinergics (atropine, glycopyrronium), or epinephrine/isoprenaline if refractory; consider pacing for profound bradycardia 1
For patients with low cardiac output, the British Journal of Anaesthesia recommends treatment with positive inotropes (dobutamine or epinephrine) 1

A PLR test should be performed before administering fluids to determine if hypovolaemia is contributing to hypotension, as recommended by the British Journal of Anaesthesia 2, 3
An increase in cardiac output after PLR strongly predicts fluid responsiveness (positive likelihood ratio = 11; 95% CI, 7.6-17; pooled specificity 92%), according to the British Journal of Anaesthesia 2
No increase in cardiac output after PLR indicates the patient will likely not respond to fluid (negative likelihood ratio = 0.13; 95% CI, 0.07-0.22; pooled sensitivity 88%), as reported by the British Journal of Anaesthesia 2

For postoperative patients with suspected hypovolaemia, only 54% actually respond to fluid boluses, meaning ~50% require correction of vascular tone or inotropy instead, according to the British Journal of Anaesthesia 2, 3
In trauma patients without brain injury, a restricted volume replacement strategy with target systolic blood pressure of 80-90 mmHg (mean arterial pressure 50-60 mmHg) until major bleeding is controlled is recommended, as stated by Critical Care 4
In patients with severe traumatic brain injury, maintain mean arterial pressure ≥80 mmHg to ensure adequate cerebral perfusion, as recommended by Critical Care 4

Phenylephrine is best for hypotension with tachycardia; causes reflex bradycardia, according to the British Journal of Anaesthesia 2, 3
Dobutamine is recommended for low cardiac output from myocardial dysfunction, as stated by the British Journal of Anaesthesia 1
Atropine or glycopyrronium is recommended as first-line for bradycardia-induced hypotension, according to the British Journal of Anaesthesia 1

For hypotension in children, an initial normal saline fluid bolus of 10-20 mL/kg (maximum 1,000 mL) is recommended, as stated by Nature Reviews Clinical Oncology 5
Avoid additional fluid boluses in patients with cardiac dysfunction or volume overload signs (pulmonary edema), as recommended by Nature Reviews Clinical Oncology 5
Consider early colloid solutions due to potential rapid capillary leak development, according to Nature Reviews Clinical Oncology 5

Target blood pressure should account for increased venous outflow pressure and extravascular compartment pressures, as recommended by the British Journal of Anaesthesia 1
Continuous intraoperative arterial pressure monitoring reduces severity and duration of hypotension compared to intermittent monitoring, according to the British Journal of Anaesthesia 1

Do not reflexively give fluids without assessing fluid responsiveness—approximately 50% of hypotensive patients are not hypovolemic, as stated by the British Journal of Anaesthesia 2, 3
Avoid aggressive fluid resuscitation in trauma without brain injury—it increases mortality, according to Critical Care 4
Do not use permissive hypotension in traumatic brain injury—maintain MAP ≥80 mmHg, as recommended by Critical Care 4

The British Journal of Anaesthesia recommends maintaining mean arterial pressure (MAP) ≥60 mmHg in at-risk surgical patients, as MAP <60-70 mmHg or systolic BP <90-100 mmHg is associated with acute kidney injury, myocardial injury, myocardial infarction, and death 6
The British Journal of Anaesthesia suggests increasing MAP targets when venous or compartment pressures are elevated—add roughly the compartment pressure to your MAP target 6

Continuous intraoperative arterial pressure monitoring reduces severity and duration of hypotension compared to intermittent monitoring, according to the British Journal of Anaesthesia 6
The British Journal of Anaesthesia recommends titrating vasoactive agents to effect rather than using fixed doses, and avoiding abrupt withdrawal of vasopressor infusions; reduce gradually 6
The British Journal of Anaesthesia advises against reflexively giving fluids without assessing fluid responsiveness, and avoiding additional fluid boluses in patients with cardiac dysfunction or volume overload signs (pulmonary edema) 6
Postoperative hypotension is often unrecognized and may be more important than intraoperative hypotension because it is often prolonged and untreated, according to the British Journal of Anaesthesia 6

The European Heart Journal recommends levosimendan for acute heart failure with hypoperfusion to reverse the effect of beta-blockade, but it is not suitable for patients with systolic blood pressure < 85 mmHg or cardiogenic shock unless combined with other inotropes or vasopressors 7
The British Journal of Anaesthesia suggests maintaining mean arterial pressure (MAP) ≥60 mmHg in at-risk patients, as MAP <60-70 mmHg or systolic BP <90-100 mmHg is associated with acute kidney injury, myocardial injury, myocardial infarction, and death 8

The British Journal of Anaesthesia recommends increasing MAP targets when venous or compartment pressures are elevated—add roughly the compartment pressure to your MAP target 8

The European Heart Journal recommends avoiding diuretics in patients with acute heart failure and signs of hypoperfusion before adequate perfusion is attained 7
The European Heart Journal suggests using beta-blockers cautiously if the patient is hypotensive 7
The European Heart Journal recommends against using inotropic agents in hypotensive acute heart failure where the underlying cause is hypovolaemia or other potentially correctable factors before elimination of these causes 7

The British Journal of Anaesthesia recommends continuous intraoperative arterial pressure monitoring to reduce severity and duration of hypotension compared to intermittent monitoring 8
The European Heart Journal suggests monitoring ECG and blood pressure when using inotropic agents and vasopressors, as they can cause arrhythmia, myocardial ischaemia, and hypotension 7