My name is Sean Blackman.I believe the answer is at least 18 hours after death.
Cpr
electrical system
An AED should be used during cardiac arrest.
The chances of survival for a person who has experienced a cardiac arrest in increased by early CPR and early defibrillation. During cardiac arrest, the heart is not pumping and the organs are not receiving oxygen. High quality CPR can provide the organs with oxygen until the heart can be defibrillated or restarted with drugs. Every minute that the organs, especially the brain, are deprived of oxygen decreases the chance of survival.
It depends on the legislation of the country.
Because cardiac arrest means heart is not beating, which means brain is not getting blood. It is the brain that signals body to breath, however the brain needs blood and will die without it. However, there are some cases of cardiac arrest where person will have whats called agonal respirations. This is where they are gasping for air, this type of breathing is abnormal and inadequate to sustain life and is a sign of near death. Even though a person may be in cardiac arrest the brainstem is still functioning enough to realize the body doesn't have enough oxygen and is signalling body to breath. This is actually a good sign during a cardiac arrest because patients with agonal breathing have higher resuscitation rates.
CPR is an emergency procedure which is attempted in an effort to return life to a person in cardiac arrest.
The medication can have adverse effects on the anesthesia possibly leading to cardiac arrest and death.
if there is any block in aorta( vein carrying oxygenated blood) and this leads to cardiac arrest which is in turn heart attack
Cardiac arrest is the only event in which CPR is appropriate. Chest compressions should never be done on a patient with a beating heart. The exception to that is treatment for choking, but that's a bit more advanced. Rescue breathing is appropriate for several medical and trauma problems, but CPR is only done during cardiac arrest. One thing to remember about cardiac arrest is that once someone is in cardiac arrest, they are DEAD. Nothing that a rescuer can do can make that person more dead. Also, in 2010, the standards are changing to what's called CCR (Cerebral Cardio Resuscitation), which is compression only CPR. No rescue breathing at all. If the heart isn't beating, the oxygen does no good. The debate has long been about whether stopping compressions for breaths, even though the cessation is brief, is bad for the perfusion pressure in the organs. They have determined that it is better to not have even brief cessations in chest compressions.
Take 10 seconds maximum to determine if a person is breathing.
A Do Not Resusciatate (DNR) is usually an advanced legal healthcare directive signed by a person who does not want to have CPR or Advanced Cardiac Life Support (ACLS) if their heart stops beating or if they stop breathing.