Days after the death of a man who was subdued by police officers on Staten Island, the Police Department is undertaking a sweeping review of its training and tactics, Commissioner William J. Bratton said on Tuesday.

A senior police official said one change under discussion was the expanded use of Taser stun guns, which are available to a small number of New York officers but have been controversial here and elsewhere because of the risk they can pose to people with heart problems and other medical issues.

The official, who spoke on the condition of anonymity, said stun guns could be a way to provide officers with more options for subduing people who were resisting arrest and avoiding the close contact that can lead to serious, even fatal, injuries to officers and suspects.

Speaking to reporters at Police Headquarters, Mr. Bratton said the goal of the review was “to develop state-of-the-art use-of-force policies.”