Cardiopulmonary Arrest in Dogs & Cats: Symptoms, Emergency Care & Recovery [2025]
Cardiopulmonary arrest is a life-threatening emergency requiring immediate CPR — survival depends on how quickly resuscitation is started and the underlying cause
When to See a Vet
Seek Emergency Care Immediately
- •Sustained absence of spontaneous breathing or breathing has visibly stopped
- •Severe loss of consciousness with no response to stimulation
- •Lips or gums turning blue-purple or markedly pale
Schedule a Clinic Visit Soon (within 24–72 hours)
- •Noticeably rapid breathing with intermittent wheezing
- •Lethargy with reduced response to normal stimuli
- •Heartbeat cannot be felt or pulse is extremely weak
01What symptoms indicate something is wrong?
Cardiopulmonary arrest is an acute, potentially fatal condition characterised by sudden loss of respiratory and circulatory function. Owners typically notice extreme weakness or complete unresponsiveness.
- Noticeably low body temperature — cold to the touch
- Blue, purple, or pale gums and skin
- Rapid, laboured, or completely absent breathing
- Altered consciousness, collapse, or seizures
- Weak or absent pulse
Seek emergency care immediately if you notice the following symptoms:
- ⚠️ Breathing difficulty or complete cessation of breathing
- ⚠️ Loss of consciousness or no response to stimulation
- ⚠️ Blue or pale gums or tongue
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02How do I assess the situation at home? Key observations and criteria for seeking emergency care
When observing at home, focus on documenting changes and capturing video footage — this information helps your vet assess the situation faster and make quicker treatment decisions.
- Note the time of onset and the order in which symptoms appeared
- Record a short video capturing breathing patterns and any collapse
- Observe and note mental status, activity level, and response to stimulation
- Measure and record body temperature and breathing rate if it can be done safely
- Track any changes in appetite, water intake, and urination or defecation
03How will the vet diagnose this? Common diagnostic tests
On arrival, real-time physiological monitoring and imaging are prioritised to identify the underlying cause and determine whether resuscitation or further treatment is required.
Chest X-ray
evaluate lung and heart changes
Ultrasound (cardiac and thoracoabdominal)
assess heart structure and fluid accumulation
Electrocardiogram (ECG)
monitor heart rhythm and electrophysiological abnormalities
Continuous pulse oximetry and blood pressure monitoring
assess oxygenation and circulatory status
CT scan for further structural evaluation if needed
04What treatment and care are needed after diagnosis? Medications, dietary changes, and care guidance
After stabilisation, identifying the underlying cause and arranging ongoing monitoring and rehabilitation is essential. Regular check-ups help prevent recurrence and allow long-term care plans to be adjusted.
- Acute phase: oxygen support and stabilisation of circulation and body temperature
- Medication and monitoring as directed by the veterinarian
- Regular follow-up visits for ECG and ultrasound checks after discharge
- Dietary adjustments, activity restrictions, and medication plans tailored to the individual patient
- Specialist referral and compliance with recommended follow-up schedule
05What should I prepare before seeing the vet? Key information to help the vet assess quickly
This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.