ICU Map

Refractory Shock Support Escalation

From multi-vasopressor failure to rescue non-adrenergic agents and mechanical circulatory support.

RecognizeAssessDecideDifferentialInterveneReassess
Refractory Shock (persistent hypoperfusion despite adequate initial resuscitation and escalating vasoactive support)
Assessment StepConfirm refractory shock: Multi-agent dependence with persistent hypoperfusionExplore Topic
Recognize refractory shock by persistent tissue hypoperfusion and worsening organ dysfunction despite correction of reversible causes, adequate initial resuscitation, and escalating/multiple vasoactive agents. Do not use one norepinephrine dose or lactate cutoff as the definition.
Decision PointEmergency bedside ultrasound: Exclude mechanical & surgical causesExplore Topic
Exclude pericardial tamponade, massive pulmonary embolism / acute cor pulmonale, tension pneumothorax, occult internal hemorrhage, and severe valvular dysfunction.
Differential Branches (2)
1Branch
Clinical ActionHyperdynamic Vasoplegic Shock (High CO, Low SVR)
For true refractory vasoplegia, reassess diagnosis and source control first. Angiotensin II may be considered in selected patients. SSC 2026 finds insufficient evidence to recommend IV methylene blue routinely; if used as rescue therapy, do so selectively with awareness of serotonergic interactions, methemoglobinemia/hemolysis risk and local expertise.
Reassessment / LoopReassess metabolic & microvascular endpoints every 1–2 hours
Track lactate trend in clinical context, capillary refill, urine output, mental status and—when relevant—cardiac output/venous oxygen saturation. Do not force ScvO2 >70% as a universal modern resuscitation endpoint.
2Branch
Clinical ActionSevere Pump Failure (Low CO, Elevated Filling Pressures)
Evaluate urgently for phenotype-specific mechanical circulatory support when shock remains refractory despite appropriate medical therapy. Device selection (VA-ECMO, microaxial flow pump, IABP or other support) depends on etiology, ventricular phenotype, revascularization strategy, contraindications and local shock-team expertise; none is a universal default for all low-output shock.
Clinical ActionEmergent ECMO / Cardiothoracic Surgical Consultation
Assess patient age, neurological status, reversible etiology (fulminant myocarditis, acute MI, cardiotomy shock), and vascular anatomy.

An educational representation of clinical reasoning, not a diagnostic algorithm or personalized medical advice — always apply clinical judgment and institutional protocols.

Caution

Escalate — Red Flags & Critical Warnings

  • Refractory shock with elevated JVP and pulsus paradoxus — perform immediate subxiphoid pericardiocentesis if tamponade physiology is confirmed on ultrasound.
  • Distal limb ischemia following VA-ECMO femoral arterial cannulation — place antegrade distal perfusion cannula immediately to avoid leg amputation.

Related Bedside Clinical Problems (21)

Bedside Presentations
Sudden Hypoxemia

Bedside triage of acute desaturation: signal verification, immediate danger screening (DOPE / tension pneumothorax), oxygen escalation ladder, and mechanism-based differential.

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Sudden Ventilator Deterioration & High Airway Pressures

Algorithmic troubleshooting of acute patient-ventilator collapse: the DOPE framework, peak vs plateau pressure differentiation, auto-PEEP evaluation, and manual bagging separation.

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Acute Hypotension & Undifferentiated Shock

Rapid bedside hemodynamic categorization: confirming MAP < 65 mmHg, assessing peripheral perfusion, POCUS cardiac/IVC profiling, and differentiating hypovolemic, distributive, cardiogenic, and obstructive etiologies.

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Linked Deep-Dive Topics (8)

Reference Knowledge
Shock: Foundational Critical Care Frameworkcardiovascular

Cellular dysoxia, DO2/VO2 physiology, the 4 shock phenotypes, dynamic fluid responsiveness (PLR/PPV) vs fluid tolerance (VExUS), and vasoactive pharmacology.

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Cardiogenic Shockcardiovascular

Primary pump failure, SCAI staging (A–E), PAC hemodynamics (CPO, PAPi), inotrope selection, emergent revascularization, and mechanical circulatory support.

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Septic Shockcardiovascular

The subset of sepsis with profound circulatory and cellular/metabolic abnormality — clinically identified by a vasopressor requirement to maintain MAP ≥ 65 mmHg plus lactate > 2 mmol/L despite adequate fluid resuscitation.

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Acute Right Ventricular Failurecardiovascular

RV anatomy and ischemia spiral, ventricular interdependence (D-sign), echocardiographic metrics (TAPSE, S', PAPi, VExUS), and the 4-pillar resuscitation strategy.

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Obstructive Shockcardiovascular

Extracardiac mechanical barriers to filling or ejection: Massive PE, Cardiac Tamponade, Tension Pneumothorax, and Auto-PEEP.

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ECMO: Physiology, Bedside Management & Troubleshootingspecial-critical-care

Specialist-level VV/VA ECMO bedside management: selection, cannulation, gas exchange, hemodynamics, anticoagulation, circuit troubleshooting, organ support, ultrasound, ECPR, weaning and decannulation.

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Pulmonary Hypertension & Acute Decompensationcardiovascular

Hemodynamic classification, right ventricular afterload reduction, selective pulmonary vasodilation, and pulmonary hypertensive crisis management.

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Cardiac Arrest & Post–Cardiac Arrest Carecardiovascular

Multimodal resuscitation, post-cardiac arrest syndrome management, targeted temperature control, and delayed neuroprognostication.

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Evidence status

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