Basic life support skills of high school students before and after cardiopulmonary resuscitation training: a longitudinal investigation.

Background: Immediate bystander cardiopulmonary resuscitation (CPR) significantly improves survival after a sudden cardiopulmonary collapse. This study assessed the basic life support (BLS) knowledge and performance of high school students before and after CPR training.

Methods: This study included 132 teenagers (mean age 14.