What is cardiac arrest?
Your brain is constantly sending an electrical impulse to the sinus node at the top of your heart telling it to pump.
When it stops receiving this signal your heart can go into ventricular fibrillation.
This is where is tries to beat at 200-300 times a minutes. This will last for seconds before your heart will stop.1 If the casualty isn’t breathing or you determine they are not breathing normally you should commence cardio pulmonary resuscitation (CPR) immediately.
If you are on your own you should call the emergency services using the speaker on your phone. If there is a bystander you should get them to find the nearest automated external defibrillator (AED).
The Sinus Node
Is a group of specialised cells in the upper right atrium of the heart.
As the heart's natural pacemaker, it generates electrical
impulses that regulate heart rhythm.
If it malfunctions, it can lead to arrhythmias (abnormal rhythms).
1 Some people with convulse in cardiac arrest (similar to a seizure)
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