Definition: Basic Life Support (BLS) certification is a relatively short training course required of most clinical health professionals to help revive, resuscitate, or sustain a person who is experiencing cardiac arrest or respiratory failure of some sort. This could include a drowning victim, heart attack or stroke patient, or any scenario where breathing or heartbeat have been compromised.

As the name of the certification implies, BLS is the most basic certification and can be obtained with a few hours of class from the Red Cross, AMA, American Heart Association, or other medical professional association that offers such courses…

Source: https://www.thebalance.com