Download Cardiac Arrest

Cardiac Arrest
What is a cardiac arrest?
A cardiac arrest is when the heart suddenly stops working. The person having a cardiac
arrest may or may not have diagnosed heart disease. It is also called sudden cardiac
arrest. Death (also called sudden cardiac death) will occur within minutes after
symptoms appear if the cardiac arrest is not treated right away.
What causes a cardiac arrest?
The most common reason for cardiac arrest is a blocked blood vessel in the heart
(coronary heart disease) or poor heart muscle function. There are other causes for
cardiac arrest. These include inherited problems that bring about rare disorders in the
heart muscle or the heart’s electrical system (e.g., Long QT Syndrome, Arrhythmogenic
Right Ventricular Cardiomyopathy or ARVC). Some cardiac arrests are due to the
extreme slowing of the heart. This is called bradycardia.
Cardiac arrest can also happen with respiratory arrest, electrocution, drowning, choking
and trauma. Sometimes, the reason for a cardiac arrest is not known.
What causes a cardiac death?
Most cardiac deaths happen when the electrical impulses in the diseased heart become
disorganized (ventricular fibrillation), too fast (ventricular tachycardia), or both. This
causes an irregular heart rhythm and it can no longer pump blood.
Brain death and possibly permanent death will within 6-10 minutes after someone has a
cardiac arrest.
Can the heart be started again after a cardiac arrest?
The heart can be restarted if it is treated within the first few minutes of stopping. This
involves CPR and giving an electric shock or defibrillation to the heart to help it restore a
normal heartbeat. A person's chance of survival is reduced by about 10 percent with
every minute that passes without CPR or defibrillation. Very few people have survived
after 10 minutes without CPR or defibrillation. It is important for the person having a
cardiac arrest to receive treatment right away.
How many people survive cardiac arrest?
The exact number of cardiac arrests that happen each year is unknown. Health
researchers think about 95 percent of cardiac arrest victims die before reaching
hospital. The survival rate is a lot higher in cities where defibrillation is done within the
first 5 to 7 minutes of having an arrest.
How can survival rates be increased?
Good long term survival rates are the result of early CPR, rapid defibrillation and being
sent to hospital for specialized care. This means more people getting CPR training and
using it in an emergency. It also means getting more Automated External Defibrillators
(AED) put in common public places like shopping malls and school hallways. If
Canadian communities increased their cardiac survival rate to 20 percent per year, it
would mean that over 4000 people a year could be saved from cardiac arrest!
Simply put, reacting quickly by performing CPR, using an AED if one is available and
calling 911 right away saves lives.