Compare conditions

Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

Post Cardiac Arrest Care

—

In one line

·The heart has been restarted after stopping, but the brain and heart are now hurt and fragile, and the next hours decide whether the person wakes up and lives.

—

Normal physiology

·Normally, the heart pumps blood nonstop to every part of the body, especially the brain, so both get a constant supply of oxygen and sugar to power their work. The brain uses that oxygen to run every thought, breath, and heartbeat; the heart itself needs oxygen-rich blood flowing through the coronary arteries (the small vessels that feed the heart muscle) to keep squeezing. As long as blood flows, cells stay alive and the body hums along smoothly.

—

What goes wrong

·When the heart stops (cardiac arrest), blood stops flowing, so the brain and heart run out of oxygen within minutes. Brain cells start to swell and die; heart muscle cells get stunned and stop squeezing properly. Even after the heart is restarted, damage keeps happening: dying brain cells leak toxic chemicals, blood vessels become leaky, and the heart may be too weak to pump well, so blood pressure drops and organs do not get enough blood. On top of that, whatever caused the heart to stop in the first place (a blocked artery, a dangerous rhythm, low oxygen, severe infection) is often still there and must be found and fixed, or the heart will stop again.

—

Hallmark signs

·No response to voice or touch
·Weak or absent breathing
·Very low or very high blood pressure
·Fast or irregular heart rhythm
·Seizures (shaking fits or stiffening)
·Cool, pale, or bluish skin
·Low oxygen level on the monitor (low SpO₂)
·Abnormal posturing (arms or legs stiff in odd positions)

—

Red flags · escalate now

·No breathing or very weak breathing after the heart starts beating again
·Seizures that keep happening or do not stop (status epilepticus)
·Pupils stay wide open and do not shrink when a light is shined in the eyes, lasting more than 72 hours
·Blood pressure drops very low despite medicines and fluids to raise it (refractory shock)
·Body temperature rises above 102°F (38.9°C) or drops below 93°F (34°C) without targeted temperature management

—

Workup

·12-lead electrocardiogram (ECG) immediately after return of spontaneous circulation
·Arterial blood gas (ABG)
·Serum lactate
·High-sensitivity troponin I or T
·Chest X-ray (portable, at the bedside)
·Continuous electroencephalogram (EEG, brain wave monitoring)
·Neuron-specific enolase (NSE) blood level at 48–72 hours after arrest
·Head CT scan (computed tomography of the brain without contrast dye) if exam worsens or does not improve as expected

—

Treatment

·Targeted Temperature Management (TTM): cool the body to 32–36°C for 24 hours, then rewarm slowly at 0.25–0.5°C per hour over 8–12 hours, then prevent fever >37.5°C for at least 72 hours after arrest
·Restore and maintain blood flow (perfusion) pressure: keep mean arterial pressure (MAP) ≥65 mmHg with IV fluids first, then norepinephrine or epinephrine infusion if fluids are not enough; keep oxygen saturation 94–98% and PaCO₂ 35–45 mmHg on the ventilator
·Emergency coronary angiography (heart catheterization) if the ECG shows STEMI or if the arrest rhythm was shockable (VF or pulseless VT) and a heart cause is likely, even if the person is still unconscious
·Sedation (propofol or midazolam continuous infusion) and analgesia (fentanyl) during TTM; add neuromuscular blockade (paralytic like rocuronium or cisatracurium) if shivering despite sedation
·Neuroprognostication (figuring out if the brain can recover) using a multimodal approach at ≥72 hours after rewarming: clinical exam (pupil and corneal reflexes, motor response to pain), continuous EEG (looking for seizures and background brain activity), brain imaging (MRI preferred, or CT), and serum biomarkers (neuron-specific enolase)
·Glycemic control: keep blood glucose 140–180 mg/dL with IV insulin infusion; check glucose every 1–2 hours initially and avoid low blood sugar (hypoglycemia) <80 mg/dL
·Seizure detection and treatment: if continuous EEG shows seizures or status epilepticus (a seizure that will not stop), give levetiracetam 1000–3000 mg IV load (or valproic acid or fosphenytoin if levetiracetam is not available), then start continuous infusion if seizures keep firing

—

NCLEX trap

·Fixed dilated pupils during therapeutic hypothermia (cooling the body on purpose to protect the brain) mean absolutely nothing. The cold itself freezes the pupils, and the paralysis medicines we give to stop shivering (like rocuronium or vecuronium) also lock the pupils wide open. When you warm the patient back up and the medicines wear off, the pupils usually come back to normal. Never declare someone brain-dead until you have warmed them completely and waited at least 72 hours after rewarming. The cold hides everything — you cannot trust any neuro exam while the body is cold.
·Too much oxygen after arrest actually harms the brain more through oxidative stress — extra oxygen molecules in the blood create free radicals (unstable chemicals) that burn and kill recovering brain cells, like rust spreading on metal. Keep oxygen saturation normal: aim for 94–98%, not sky-high. This is called controlled normoxia in current AHA (American Heart Association) guidelines. The brain needs enough oxygen, not a flood of it.
·Keep blood sugar between 140 and 180 mg/dL on purpose — this range protects the brain better than tight control. Do not chase down every high sugar with insulin. Tight control (keeping sugar under 110 mg/dL) actually hurts brain recovery and causes dangerous low-sugar swings that can kill brain cells just as badly as the arrest did. Mild high blood sugar (hyperglycemia) (a bit high) is safer than low blood sugar (hypoglycemia) (too low) in the first few days after arrest.
·Cool first if the patient meets criteria for therapeutic hypothermia (comatose after return of spontaneous circulation from a shockable rhythm like ventricular fibrillation or pulseless ventricular a fast heart rate (tachycardia)), then take them to the cath lab once they are stable enough to survive the trip. Delaying cooling to run straight to the cath lab gives the brain more time to swell and die. Current AHA guidelines say you can do both — start cooling during transport to cath if needed (give a cold saline bolus in the ambulance or ER, apply ice packs) — but never skip cooling just to cath faster. Brain protection starts immediately; the cath can happen in the next hour or two.
·Paralysis only stops the muscles from moving — it does not touch pain, fear, or awareness. The patient could be fully awake inside, terrified, feeling the cold and the breathing tube, but completely unable to move, blink, or signal for help. This is called being locked in, and it is torture. Always give deep sedation (propofol, midazolam, or fentanyl) along with paralysis, or the patient is conscious and suffering in silence. Never paralyze without sedating first — this is a core ICU safety rule.
·Do not predict recovery or give up until at least 72 hours after rewarming is complete. Many patients wake up late — some as late as day 5, day 7, or even longer. Brain recovery after cardiac arrest takes time; the brain was starved of oxygen and is healing slowly. Early reflex tests (pupil reaction, corneal reflex) and EEG during cooling are meaningless because the cold and sedation hide everything. Wait, rewarm the patient slowly, stop sedation, and check the full neuro exam again at 72 hours or more. Patience saves lives here.

—

Install Maldek by Hill as an app — studies work even offline