cardiovascular / hemodynamic

High-Risk PE, Acute RV Failure & Obstructive Shock

Shock or peri-arrest physiology with suspected pulmonary embolism or acute RV failure requiring RV-protective resuscitation and immediate reperfusion planning.

CLINICAL ALGORITHMMedically Verified (2026-09-15)

High-risk PE / acute RV failure: support the RV while reperfusion is organized

Level: Controlled React algorithm

Visual bedside algorithm

High-risk PE / acute RV failure: support the RV while reperfusion is organized

Step 1 · Emergency

Recognize high-risk physiology

Persistent hypotension, obstructive shock or arrest
Bedside echo may show acute RV dilation/dysfunction
A crashing patient may be too unstable for CT

Step 2 · Treat

Protect the RV

Correct hypoxemia and severe acidemia/hypercapnia
Norepinephrine to defend systemic/RV coronary perfusion when hypotensive
Avoid indiscriminate large fluid boluses; small preload challenge only in selected underfilled patients

Step 3 · Assess / decide

Reperfusion pathway

Therapeutic anticoagulation when appropriate and no prohibitive bleeding contraindication
Activate PERT/local reperfusion team immediately
Select systemic thrombolysis, catheter therapy or surgical embolectomy by shock/arrest phenotype, bleeding risk, anatomy and expertise

Step 4 · Escalate / reassess

Rescue

Intubation/positive pressure can precipitate collapse—optimize before induction
Consider VA-ECMO/MCS as a bridge in selected refractory shock/arrest
Continuously reassess RV function, perfusion, oxygenation and bleeding risk

Bedside bottom line

In acute RV failure, excessive preload and abrupt increases in pulmonary vascular resistance can both worsen systemic output—resuscitate the RV, not just the blood pressure.

Figure: High-risk PE / acute RV failure: support the RV while reperfusion is organized. This action-focused visual summarizes the linked Clinical Problem; the full problem text, evidence references and local policy remain the source of truth.(Action pathway — use the full evidence-linked problem and local protocol for clinical decisions)

Recognize

Suspect high-risk PE when acute dyspnea/hypoxemia, syncope or chest symptoms are accompanied by persistent hypotension, obstructive shock or cardiac arrest. Bedside echo may show acute RV dilation/dysfunction and venous ultrasound may show DVT, but no single echocardiographic sign proves PE.

Stabilize the RV

Correct hypoxemia, defend coronary/RV perfusion with norepinephrine when hypotensive, and avoid indiscriminate large fluid boluses. A small preload challenge may help selected underfilled patients, but excess volume can worsen RV dilation, septal shift and systemic output.

Airway caution

Positive-pressure ventilation and induction can precipitate collapse in severe RV failure. If intubation is unavoidable, optimize preload/vasopressor support first, use a hemodynamically cautious induction strategy and avoid excessive mean airway pressure, hypoxemia, hypercapnia and severe acidosis.

Anticoagulation / reperfusion

Do not delay a crashing patient

Escalate

Caution

The failing RV is highly sensitive to abrupt reductions in preload and increases in pulmonary vascular resistance. Intubation, severe hypercapnia/acidemia and unnecessary fluid loading can all worsen shock.

Direct evidence for this problem

2 sources

guideline•2026

Guideline for the Evaluation and Management of Acute Pulmonary Embolism in Adults ↗

Current US acute-PE guideline for risk stratification, PERT activation and reperfusion options in high-risk PE.

guideline•2023

Diagnosis and treatment of right ventricular failure secondary to acutely increased right ventricular afterload (acute cor pulmonale): a clinical consensus statement ↗

Consensus guidance for acute right-ventricular failure physiology and hemodynamic support.

Evidence status

Review metadata not yet recorded.

Status, review dates and guideline versions appear here once editorial metadata is authored for this content.

Actionable Clinical Workflows (8)

Step-by-step ICU Processes

Acute Hypoxemia

From confirming true hypoxemia to identifying the underlying mechanism.

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Initial Hemodynamic Resuscitation & Shock Bundling

From recognizing hypoperfusion and initial crystalloid bolus to dynamic fluid responsiveness assessment and vasopressor targets.

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Vasopressor & Inotrope Initiation & Titration

From first-line norepinephrine titration to multi-agent vasopressor escalation and inotrope selection.

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Refractory Shock Support Escalation

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

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Deep-Dive Topic Destinations (3)

Reference Knowledge

Acute Pulmonary Embolismrespiratory

Pulmonary vascular occlusion, acute RV pressure overload, ESC/AHA risk stratification, systemic thrombolysis, catheter-directed therapies, and hemodynamic support.

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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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