I used to know this, but then I forgot and I can't seem to Google it. What is the name of that condition, usually acute and brought about by extreme anxiety or fear, in which you feel your heart pounding so powerfully that it seems to pulsate your entire chest cavity, and you can even feel your heartbeat pulsating in your ears? It's not tachycardia or fibrillation or anything as simple as that. The heart rate is normal or slightly faster than normal in this case. It can be a bit painful, but it passes within a few seconds or minutes and it usually requires no intervention. It's a fairly rare term that even many doctors don't know or have forgotten since the memorization days of the USMLE. Does anyone know what I'm talking about?