MCs clinical Anatomy & Human Morphology, Anatomical Education . researcher. MBBS. Teach anatomy & PBL . CHQO. writer .BLS instructor
The thorax or chest is a part of the anatomy of humans and various other animals located between the neck and the abdomen. The thorax includes the thoracic cavity and the thoracic wall. It contains organs including the heart, lungs, and thymus gland, as well as muscles and various other internal structures.
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During cardiac arrest, there is no blood flow. Chest compressions create a small amount of blood flow to the vital organs such as the brain and heart - the more effective the chest compressions, the more blood flow is produced. Chest compressions that are too shallow or too slow or chest compressions that are interrupted frequently do not deliver as much blood flow to the brain and heart as effective chest compressions. Every time chest compressions are restarted following an interruption, the first few compressions are not as effective as later compressions. Frequent or prolonged interruptions in chest compressions decrease blood flow and the victim's chance of survival.
CPR may not save the victim even when performed properly, but if started within 4 minutes of cardiac arrest and defibrillation is provided within 10 minutes, a person has a 40% chance of survival.