Cardiovascular Collapse
Sudden failure of the circulation to maintain blood flow
Quick Facts
- Type: Life-threatening emergency
- What happens: Blood pressure and flow fail
- Action: Call emergency services at once
- Possible causes: Severe shock, cardiac arrest
Overview
Cardiovascular collapse is a sudden and severe failure of the circulatory system, in which the heart and blood vessels can no longer keep blood flowing well enough to supply the body's organs with oxygen. When this happens, blood pressure drops sharply, the brain and other vital organs are starved of oxygen, and the person may lose consciousness within seconds. It is a true medical emergency.
If someone suddenly collapses and is unresponsive or not breathing normally, call emergency services immediately and begin CPR if you are trained. Cardiovascular collapse is not a single disease but the final common pathway of several life-threatening problems, such as severe shock, a dangerous heart rhythm, a massive blood clot in the lungs, or cardiac arrest. Survival depends on how quickly the cause is recognized and treated, so rapid emergency response is critical.
Symptoms
Cardiovascular collapse often comes on suddenly, sometimes with brief warning signs beforehand.
- Sudden loss of consciousness or fainting
- Pale, gray, or bluish skin
- A very weak, rapid, or absent pulse
- Extremely low blood pressure
- Cold, clammy skin
- Confusion, severe weakness, or a feeling of impending doom just before collapse
- Absent or gasping breathing if the heart has stopped
Any sudden collapse with unresponsiveness or abnormal breathing should be treated as a life-threatening emergency.
Causes
Several emergencies can lead to cardiovascular collapse, often by overwhelming the heart's pumping ability, the volume of circulating blood, or the tone of the blood vessels.
- Cardiac arrest or dangerous heart rhythms: When the heart stops pumping effectively.
- Severe shock: Including heavy blood loss, severe infection (sepsis), or a major allergic reaction (anaphylaxis).
- Massive heart attack: Damaging enough heart muscle to cause cardiogenic shock.
- Large blood clot in the lungs: Blocking blood flow through the heart and lungs.
- Severe drug or poison effects: That depress the heart or blood vessels.
- Major fluid loss or dehydration: Reducing the blood volume the heart can pump.
Risk Factors
- Existing heart disease or prior heart attack
- Serious heart rhythm disorders
- Severe infection or major injury with bleeding
- Severe allergies at risk of anaphylaxis
- Overdose or poisoning
- Conditions causing blood clots
Diagnosis
In an emergency, treatment and assessment happen together, and finding the cause is urgent.
- Immediate assessment: Checking responsiveness, breathing, and pulse to guide resuscitation.
- Heart monitoring (ECG): To detect dangerous rhythms or a heart attack.
- Blood tests: To look for blood loss, infection, electrolyte problems, or drug levels.
- Imaging: Such as ultrasound of the heart or scans to find a clot, bleeding, or other cause.
Treatment
Treatment is urgent and aims to restore circulation while addressing the underlying cause.
- CPR and defibrillation: If the heart has stopped or is in a shockable rhythm.
- Airway and breathing support: Including oxygen and, if needed, a breathing tube.
- Intravenous fluids and medications: To raise blood pressure and support the heart and blood vessels.
- Treating the cause: Such as stopping bleeding, treating infection, giving epinephrine for anaphylaxis, opening a blocked artery, or reversing a drug effect.
- Intensive care: Close monitoring and organ support during recovery.
Prevention
Prevention focuses on managing the conditions that can lead to collapse and acting fast on warning signs.
- Manage heart disease, blood pressure, and rhythm disorders with your care team
- Carry and use prescribed emergency treatment, such as an epinephrine auto-injector for severe allergies
- Seek prompt care for chest pain, severe infection, heavy bleeding, or severe dehydration
- Learn CPR, which can save a life when collapse occurs
- Store medicines safely to prevent accidental overdose
When to See a Doctor
Cardiovascular collapse is a medical emergency. Call emergency services immediately if someone:
- Suddenly collapses and is unresponsive
- Is not breathing or is only gasping
- Has no pulse or a very weak, rapid pulse with pale or bluish skin
Begin CPR if you are trained and use an automated external defibrillator (AED) if one is available. Seek urgent medical evaluation for warning signs such as fainting, severe chest pain, a racing or irregular heartbeat, or signs of severe infection or allergic reaction.
Frequently Asked Questions
What is cardiovascular collapse?
It is a sudden, severe failure of the heart and blood vessels to keep blood flowing, causing blood pressure to drop and depriving organs of oxygen. It is a life-threatening emergency that often leads to loss of consciousness within seconds.
What should I do if someone collapses suddenly?
Call emergency services immediately. If the person is unresponsive and not breathing normally, begin CPR if you are trained and use an automated external defibrillator (AED) if one is available. Fast action greatly improves the chance of survival.
What causes cardiovascular collapse?
It can result from cardiac arrest or dangerous heart rhythms, severe shock from bleeding, infection (sepsis), or a major allergic reaction, a massive heart attack, a large clot in the lungs, severe poisoning, or major fluid loss.
Is cardiovascular collapse the same as cardiac arrest?
They overlap but are not identical. Cardiac arrest, when the heart stops pumping, is one major cause of cardiovascular collapse. Collapse can also result from other emergencies such as severe shock or anaphylaxis, even before the heart fully stops.
Can cardiovascular collapse be survived?
Yes, especially when it is recognized and treated quickly. Immediate CPR, defibrillation when appropriate, and emergency treatment of the underlying cause can be lifesaving, which is why calling for help and starting CPR without delay is so important.
References
- American Heart Association. CPR and emergency cardiovascular care.
- MedlinePlus, U.S. National Library of Medicine. Shock.
- National Heart, Lung, and Blood Institute (NHLBI). Cardiac arrest.
- Centers for Disease Control and Prevention (CDC). Heart disease.