Standard cardiopulmonary resuscitation (CPR) involves alternating chest compressions with rescue breaths. But heart attack patients who receive CPR from bystanders fare better if their resuscitators skip the rescue breaths and do only chest compression, according to a study led by researchers at Washington University School of Medicine in St. Louis. https://source.wustl.edu/2010/10/chest-compressiononly-cpr-improves-survival-in-cardiac-arrest-patients/