Cardiogenic Shock

Overview

Cardiogenic shock is a critical, life-threatening state in which the heart is suddenly too weak to pump enough blood to supply the body's organs. As blood flow falls, the brain, kidneys, liver, and other organs do not get the oxygen they need, and they begin to fail. Unlike many causes of shock that involve low blood volume, cardiogenic shock is a pump problem: the heart itself cannot do its job.

This condition most often develops after a severe heart attack that damages a large portion of the heart muscle, but other heart problems can cause it too. Cardiogenic shock is a medical emergency with a high risk of death, and survival depends on rapid recognition and emergency treatment to restore blood flow and support the heart.

Common Causes

Cardiogenic shock develops when the heart's pumping ability is severely impaired. Common causes include:

• Severe heart attack: A large heart attack that damages a major part of the heart muscle is the most common cause.
• Heart failure: Advanced or suddenly worsening heart failure can progress to shock.
• Dangerous heart rhythms: Very fast or very slow arrhythmias can prevent effective pumping.
• Heart valve problems: Sudden valve failure or rupture can overwhelm the heart.
• Other heart injuries: Inflammation of the heart muscle, certain medication effects, or mechanical complications of a heart attack.

People who have had a previous heart attack, heart failure, or significant coronary artery disease are at higher risk.

Associated Symptoms

Cardiogenic shock causes signs that organs are not getting enough blood, often on top of symptoms of the underlying heart problem:

• Cold, clammy, pale, or bluish skin
• A rapid, weak pulse and low blood pressure
• Shortness of breath or rapid breathing
• Confusion, restlessness, or reduced alertness
• Reduced or absent urine output
• Chest pain if a heart attack is the cause
• Severe weakness and fainting

These signs together, especially after chest pain, indicate the body is in shock and need emergency care.

Diagnosis & Evaluation

Cardiogenic shock is recognized and treated urgently in an emergency or hospital setting. Evaluation, carried out alongside treatment, may include:

• Blood pressure, heart rate, and oxygen monitoring
• An electrocardiogram (ECG) to detect a heart attack or dangerous rhythm
• Blood tests including heart enzymes and markers of organ function
• An echocardiogram to assess how well the heart is pumping and check the valves
• Coronary angiography to look for blocked arteries

Because the condition can deteriorate within minutes, diagnosis and treatment proceed together with the goal of restoring blood flow as fast as possible.

Treatment & Management

Treatment is intensive and aimed at supporting the circulation and fixing the underlying heart problem. In a hospital this may include:

• Restoring blood flow to the heart: Emergency procedures to open a blocked artery, such as angioplasty with a stent, when a heart attack is the cause.
• Medications: Drugs to support blood pressure and help the heart pump more effectively.
• Oxygen and breathing support: Supplemental oxygen and, if needed, a ventilator.
• Mechanical support: Devices that temporarily help the heart pump while it recovers or while other treatments are arranged.
• Treating the cause: Repairing a valve, correcting a rhythm, or managing other contributing problems.

Cardiogenic shock is treated in intensive care, and rapid emergency response is essential to improve the chances of survival.

Reducing Your Risk

Because cardiogenic shock most often follows a heart attack, protecting the heart and acting fast on heart symptoms are the best ways to lower the risk:

• Reduce heart attack risk: Control blood pressure, cholesterol, and diabetes, avoid smoking, stay active, and eat a heart-healthy diet.
• Act fast on chest pain: Seeking emergency care quickly for a possible heart attack and getting blocked arteries opened promptly reduces heart muscle damage and the risk of shock.
• Manage heart failure: Follow your treatment plan, take medications as prescribed, and watch for worsening symptoms.
• Attend follow-up care: Regular reviews after a heart attack or with heart disease help catch problems early.
• Know the warning signs: Recognizing chest pain, breathlessness, and other heart attack symptoms allows faster treatment.

Prompt treatment of a heart attack is the single most important factor in preventing it from progressing to cardiogenic shock.

When to See a Doctor

Cardiogenic shock is always a medical emergency. Call emergency services immediately if someone has signs of shock, especially after chest pain, such as:

• Cold, clammy, pale, or bluish skin with a weak, rapid pulse
• Severe shortness of breath or rapid breathing
• Confusion, drowsiness, or fainting
• Chest pain or pressure that does not go away

While waiting for help, keep the person calm and as still as possible, loosen tight clothing, and be ready to start CPR if they become unresponsive and stop breathing normally. Do not give food or drink. Anyone with these symptoms needs hospital care without delay.

Related Topics

Frequently Asked Questions

References

1. Mayo Clinic. Cardiogenic shock — Symptoms and causes.
2. MedlinePlus, U.S. National Library of Medicine. Cardiogenic shock.
3. National Heart, Lung, and Blood Institute (NHLBI). Heart Attack.
4. American Heart Association. Cardiogenic Shock.