The cardiovascular system is responsible for pumping blood throughout the body. It delivers oxygen and nutrients to the cells and removes waste products. 

The heart acts as a pump and is the main organ of the cardiovascular system. It is a muscular organ that pumps blood through a network of blood vessels.

The heart's beating is controlled by an electrical system. This system sends electrical impulses that cause the heart muscle to contract in sync to efficiently pump blood throughout the body.

The respiratory system is responsible for taking in oxygen from the air and releasing carbon dioxide. The main organs of the respiratory system are the lungs.

The air enters the body through the nose or mouth and travels down the windpipe (trachea) and into the two bronchi. The bronchi divide into smaller and smaller tubes called bronchioles. The bronchioles end in tiny air sacs called alveoli.

The alveoli are surrounded by blood vessels. When we breathe in, the oxygen from the air passes through the walls of the alveoli and into the blood. The blood then carries the oxygen to the cells throughout the body.

Cardiopulmonary Resuscitation (CPR) is a life-saving technique that is used when a person's heart has stopped beating effectively and blood flow throughout the body stops. 

CPR involves chest compressions and rescue breaths. Chest compressions help to keep oxygenated blood flowing to the brain and heart, while rescue breaths help to provide oxygen to the blood. Typical rescue breaths contain 16% oxygen, however if you have oxygen-enabled equipment such as the Maxima SoftPack, it is capable of delivering close to 99% oxygen.

It is important to have effective chest compressions about 5cm in depth at 100 compressions/min. After each compression, it is critical to allow the chest to fully recoil before the next compression.

Brain damage will start to set in within 4 minutes, and every minute that CPR is delayed, reduces the survival rate by 10%. The power to save a life is truly within your hands.

AED stands for Automated External Defibrillator. It is a portable, electronic device that can be used to deliver an electric shock to the heart in order to restore a normal heart rhythm

It is used on a person who has sudden cardiac arrest. When the pads are attached to the victim, it analyses the heart rhythm to determine if it is a shockable. 

The common shockable rhythm is ventricular fibrillation (VF) which causes the heart to be unable to pump due to uncoordinated electrical activity.

The AED is designed to be able to deliver sufficient electrical energy through a shock to stop and allow the heart to reset it's electrical activity. It can take up to 2 minutes for the heart to reset itself.

Some AEDs have 2 sets of Defibrillation Pads (Adult/Child) to administer appropriate electrical energy levels. The next-generation AEDs such as AED-3100 has superior technology to toggle between Adult and Child modes by a flip of a switch, removing the hassle of changing and maintaining 2 sets of Defibrillation Pads.