For adults with cardiac arrest, compression-only (hands-only or cardiocerebral resuscitation) CPR which involves chest compressions without artificial ventilation is recommended as the method of choice for the untrained rescuer or those who are not proficient as it is easier to perform and instructions are easier to give over a phone.
In adults with out-of-hospital cardiac arrest, compression-only CPR by the lay public has an equal or higher success rate than standard CPR.
It is hoped that the use of compression-only delivery will increase the chances of the lay public delivering CPR.

Compression-only CPR is not as good for children who are more likely to have cardiac arrest from respiratory causes.
Two reviews have found that compression-only CPR had no more success than no CPR whatsoever.
Rescue breaths for children and especially for babies should be relatively gentle.
Either a ratio of compressions to breaths of 30:2 or 15:2 was found to have better results for children.
Both children and adults should receive a hundred chest compressions per minute.
Other exceptions besides children include cases of drownings and drug overdose.
 In both these cases, compressions and rescue breaths are recommended if the bystander is trained and is willing to do so.

As per the American Heart Association, the beat of the Bee Gees song "Stayin' Alive" provides an ideal rhythm in terms of beats per minute to use for hands-only CPR.
One can also hum Queen's "Another One Bites The Dust", which is 110 beats-per-minute and contains a memorable repeating drum pattern.
For those in cardiac arrest due to non heart related causes and in people less than 20 years of age, standard CPR is superior to compression-only CPR.
For adults with cardiac arrest, compression-only (hands-only or cardiocerebral resuscitation) CPR which involves chest compressions without artificial ventilation is recommended as the method of choice for the untrained rescuer or those who are not proficient as it is easier to perform and instructions are easier to give over a phone. In adults with out-of-hospital cardiac arrest, compression-only CPR by the lay public has an equal or higher success rate than standard CPR. It is hoped that the use of compression-only delivery will increase the chances of the lay public delivering CPR.
Compression-only CPR is not as good for children who are more likely to have cardiac arrest from respiratory causes. Two reviews have found that compression-only CPR had no more success than no CPR whatsoever. Rescue breaths for children and especially for babies should be relatively gentle. Either a ratio of compressions to breaths of 30:2 or 15:2 was found to have better results for children. Both children and adults should receive a hundred chest compressions per minute. Other exceptions besides children include cases of drownings and drug overdose.  In both these cases, compressions and rescue breaths are recommended if the bystander is trained and is willing to do so.
As per the American Heart Association, the beat of the Bee Gees song "Stayin' Alive" provides an ideal rhythm in terms of beats per minute to use for hands-only CPR. One can also hum Queen's "Another One Bites The Dust", which is 110 beats-per-minute and contains a memorable repeating drum pattern. For those in cardiac arrest due to non heart related causes and in people less than 20 years of age, standard CPR is superior to compression-only CPR.
Cardiopulmonary resuscitation