Post-Cardiac Arrest Care After ROSC

Phase 1: Initial Stabilization (Do Immediately)

1. Airway - Secure It

• If not already intubated, place an endotracheal tube (ETT) immediately
• An unprotected airway is a leading cause of re-arrest from hypoxia

2. Respiratory Parameters - Titrate Carefully

Avoid both hyperoxia (causes reperfusion injury) and hypoxia. Avoid hypo/hypercapnia - both worsen cerebral blood flow and outcomes. Use lung-protective ventilation settings.

3. Hemodynamic Parameters - Maintain Perfusion

• Post-arrest hypotension occurs in up to 65% of patients within 6 hours of ROSC and is an independent predictor of death (Red Cross/ILCOR guidelines)
• Use IV fluids and vasopressors (norepinephrine, dopamine) as needed to hit these targets
• The 2024 AHA/ILCOR consensus recommends a MAP of at least 60-65 mmHg in adults

Phase 2: Identify and Treat the Cause (The H's and T's)

Phase 3: Get a 12-Lead ECG - Check for STEMI

• Obtain a 12-lead ECG as soon as possible
• If STEMI is present, or there is unstable cardiogenic shock, or mechanical circulatory support is needed --> immediate cardiac catheterization / PCI (percutaneous coronary intervention)
• Unrevascularized coronary occlusion is a top cause of re-arrest

Phase 4: Neurological Status and TTM

If NOT following commands (comatose):

• Start Targeted Temperature Management (TTM) as soon as possible
  • Target core temperature: 32-36°C for 24 hours using a cooling device with feedback loop
  • Prevents secondary brain injury from post-arrest cerebral reperfusion damage
• Obtain brain CT scan
• Start continuous or intermittent EEG monitoring (detect and treat seizures - seizures after ROSC worsen outcomes and can cause re-arrest)
• Continuously monitor core temperature (esophageal, rectal, or bladder probe)

If awake and following commands:

• Continue standard critical care management
• Still monitor closely for arrhythmia recurrence

Phase 5: Ongoing Critical Care

• Euglycemia: Control blood sugar - avoid both hypoglycemia and hyperglycemia. Glycemic control in the post-arrest patient significantly impacts outcomes.
• Antiarrhythmic therapy: If the arrest was due to VF/VT, consider IV amiodarone infusion (150 mg over 10 min, then 1 mg/min maintenance) or lidocaine to prevent recurrence.
• Expert consultation: Cardiology, neurology, and critical care involvement for continued management.
• Post-event debriefing of the resuscitation team.

Summary: The 5-Point "Don't Re-Arrest" Plan

• Morgan & Mikhail's Clinical Anesthesiology, 7e, Fig. 55-14 (Post-Cardiac Arrest Care Algorithm)
• Roberts and Hedges' Clinical Procedures in Emergency Medicine, p. 314-320
• ERC/ESICM Post-Resuscitation Care Guidelines 2025

Post-Resuscitation Management: Unconscious Patient, No CT Available

First - The Universal Steps (Do These No Matter What the BP Is)

1. Airway - Lock It Down

• Intubate if not already done (RSI with ketamine + succinylcholine or rocuronium)
• Confirm ETT with waveform capnography (EtCO2)
• Set ventilator:
  • RR: 10-12 breaths/min
  • TV: 6-8 mL/kg ideal body weight (lung-protective)
  • SpO2 target: 94-98% - do NOT give 100% O2, it causes cerebral reperfusion injury
  • PaCO2 target: 35-45 mm Hg (normocapnia) - avoid both hypo and hypercapnia

2. Lines and Monitoring - Put In Now

• IV access x2 (large bore) or central line
• Arterial line if available (gives you beat-to-beat BP and blood gases)
• Cardiac monitor continuously
• 12-lead ECG immediately - look for STEMI, arrhythmia
• Foley catheter - urine output is your best bedside perfusion marker (target >0.5 mL/kg/hr)
• Check blood glucose - treat hypoglycemia immediately (dextrose 50%, 1 amp)
• Temperature probe (rectal or esophageal) if available

3. Start Targeted Temperature Management (TTM) NOW

• Target: 32-36°C for 24 hours
• Use ice packs (axilla, groin, neck), cold IV saline (10-20 mL/kg over 20-30 min), or commercial cooling blanket
• Fever (>37.5°C) after arrest causes severe secondary brain injury - this is your biggest enemy in the absence of CT
• Treat shivering: IV paracetamol 1g, IV magnesium sulfate 2-4g, sedation (propofol infusion 5-50 mcg/kg/min or midazolam 0.02-0.1 mg/kg/hr)

Now - The BP-Specific Plans

SCENARIO A: HYPOTENSION (SBP < 90 mmHg / MAP < 65 mmHg)

• Myocardial stunning (most common - heart is stunned from arrest)
• Hypovolemia (from CPR, fluids lost, bleeding)
• Tension pneumothorax (decompress if suspected - needle 2nd ICS MCL, then chest tube)
• Cardiac tamponade (Beck's triad? Do bedside ultrasound/FAST if available)
• Massive PE (history? preceding collapse?)

• IV crystalloid bolus: 250-500 mL normal saline or Ringer's lactate over 10-15 minutes
• Reassess BP and lung sounds after each bolus
• If crackles appear or SpO2 drops - STOP fluids, switch to vasopressors

• Titrate to MAP ≥ 65 mmHg (this protects the brain and coronary circulation)
• If MAP still cannot reach 65 despite norepinephrine + vasopressin - add epinephrine (suggests myocardial stunning / cardiogenic shock)

• Add dobutamine 2.5-10 mcg/kg/min (inotrope) alongside the vasopressor
• Consider balloon pump if available at the receiving center
• This patient needs urgent echo and cardiology

SCENARIO B: HYPERTENSION (SBP > 160 mmHg / MAP > 110 mmHg)

• Intracranial hemorrhage causing Cushing's reflex (high BP + bradycardia + irregular breathing = brain herniation)
• Extreme sympathetic surge post-arrest

• If you suspect Cushing's response (very high BP + bradycardia + irregular/slow respirations), the cause is intracranial pressure - lowering BP here can be fatal. In this case:
  • Head of bed at 30°
  • Mannitol 0.5-1 g/kg IV over 20 min or hypertonic saline 3% (100-150 mL over 20 min)
  • Urgent neurosurgical consultation
  • This patient absolutely needs CT as soon as possible - transfer if necessary

• Often self-resolves as catecholamine surge settles
• Gentle sedation: propofol infusion (titratable, short-acting) or IV labetalol 10-20 mg slow push (has both alpha and beta blockade, does not drop BP suddenly)
• Target: MAP 80-100 mmHg (do NOT bring to "normal" - the brain needs higher perfusion after arrest)
• Avoid nitroprusside and hydralazine in unconscious post-arrest patients - they cause unpredictable drops and can worsen cerebral perfusion

SCENARIO C: NORMAL BP (SBP 90-160, MAP 65-100)

• Keep all the universal steps running (airway, TTM, monitoring)
• Start a maintenance IV infusion at ~75-100 mL/hr
• Have vasopressors drawn up and ready to start at bedside
• Recheck BP every 5-10 minutes for the first hour (BP post-arrest can crash suddenly due to myocardial stunning developing over time)
• 12-lead ECG - look for STEMI (can have normal BP and still have an occluded coronary)
• Treat any arrhythmia that appears:
  • VT/VF recurrence: Amiodarone 150 mg IV over 10 min, then 1 mg/min infusion for 6 hours
  • Bradycardia (HR < 50 with poor BP): Atropine 0.5 mg IV (can repeat up to 3 mg total), then transcutaneous pacing

The "Bedside Bundle" When No CT Is Available

Summary Card

UNCONSCIOUS POST-ROSC PATIENT - NO CT AVAILABLE

ALWAYS:
 ✓ Intubate → SpO2 94-98%, RR 10, PaCO2 35-45
 ✓ 12-lead ECG → STEMI? Arrhythmia?
 ✓ Blood glucose → fix if low
 ✓ Start cooling (TTM 32-36°C)
 ✓ Sedation infusion (propofol or midazolam)
 ✓ Continuous monitoring + foley

LOW BP (MAP < 65):
 ✓ 250-500 mL fluid bolus → reassess
 ✓ Norepinephrine infusion 0.1-0.5 mcg/kg/min
 ✓ Add vasopressin or epinephrine if fails
 ✓ Dobutamine if cardiogenic shock

HIGH BP (SBP >160):
 ✓ Check pupils + HR + breathing (Cushing's?)
 ✓ If Cushing's: mannitol + 30° HOB
 ✓ If catecholamine surge: propofol or labetalol
 ✓ Target MAP 80-100, NOT normal

NORMAL BP:
 ✓ IV maintenance running
 ✓ Vasopressors drawn up at bedside
 ✓ Recheck every 5-10 min x 1 hour
 ✓ Treat arrhythmia (amiodarone for VT/VF)