I had an ablation done about 1 1/2 years ago at University Hospital in Newark. My irregular heart beat was causing clots to form in my heart. If they break loose, they can get caught in your lungs, heart or brain. And you can have a stroke. What they did was to insert 4 tubes in my groin area pushing them up towards my heart. When they get into position, they start applying voltages to the heart to burn off the nerves, that were applying electrical pulses to the heart. Causing it to have the irregular heart beat. Not all and every nerve gets zapped, just the ones that were causing the problem. It was a overnight stay. They put you on drugs to keep the beat steady , then check you about once a month to see if you have gone back into afib, which sometime happens.If it has, then they have to go back in and do it again if you have.,,,