If someone needs first aid and it doesn't work, are you responsible?

In the case of others in critical condition, their families to send to the hospital first aid, and you can first aid to stop, after the fact because you implement the first aid behavior is invalid, the patient's death and you do not have first-aid equipment or first aid measures are not appropriate, there is a causal relationship. Then you have to bear the corresponding liability. To the patient to implement medical emergency, first aid must be a licensed physician, such as you do not have a licensed physician qualification, the patient to implement the so-called first aid, is a kind of illegal practice of medicine. If the serious consequences, to bear the criminal responsibility of illegal practice of medicine.