Cardiac arrest requires immediate CPR if necessary ACLS or ALS(Advanced Life Support). However in case of Bronchial Asthma if a patients develop Respiratory fatigue and his Oxygen concentration in blood starts falling put him on a ventilator, but wean him off as early as possible OR if he develops Cyanosis CPR + ALS. There are other protocols for all the above disease but you stick to cardiac arrest and asthma. Don t forget Cardiac Asthma, severe cases may requires ACLS. So it is the indication and symtomology of the patient that gives rise to CPR, ACLS etc. no hard and fast rule.