How long is too long for heart palpitations to last?

Asked by missjena (918) January 12th, 2010 from iPhone

I’m making an appointment tomorrow but I’ve had an EKG and echocardiogram a year ago. I’m going to need a 24 hour heart monitor. I have a question. I can’t find the answer online. How long do benign heart palpitations last? Since mine last for almost 11 straight hours does that mean it’s not a benign conditiion? I can’t get rid of them and it prevents me from sleep. Help!