Analysis of factors influencing cardiopulmonary resuscitation and survival outcome in adults after in-hospital cardiac arrest:a retrospective observational study

To the Editor:Cardiopulmonary resuscitation(CPR)guidelines,especially the latest 2020 guidelines issued by the American Heart Association(AHA),have emphasized the importance of high-quality CPR.[1]The research on cardiac arrest(CA)and CPR has dramatically increased in recent years,and the international recovery guidelines are also being revised and implemented.However,the outcome of in-hospital cardiac arrest(IHCA)remains poor,and the understanding of the prognostic factors for survival outcome after IHCA is lacking,especially in China.Patients with CA are often poorly treated,and the incidence and mortality of CA are increasing yearly.[2]This study analyzed the effects of CPR,and explored the factors that affect survival outcome after IHCA in adults.