What a beating heart looks like during surgeryCasey Chan2/21/14 8:55pm243EditPromoteDismissUndismissHideGo to permalink Buh-bum. Buh-bum. Buh-bum. We all have our own interpretations of what a heartbeat sounds like but here is what it looks like during heart surgery. It looks like it's rolling in place inside your chest. Pretty amazing.