The two phrases "anxiety attack" and "panic attack" are used interchangeably by the general public. However, they do mean different things to a psychiatrist or another health care professional. They have similar symptoms (panic, breathing heavily, palpitations, sweating and so on) however the cause of each is different. Anxiety attacks are brought on by anxiety; worrying about something bad which is real or perceived to be happening. A true panic attack on the other hand, such as someone with Panic Disorder experiences, comes on completely without warning, and often without explanation. Hope that is helpful.