Pattiej,
You probably have it covered with your Dr. Fischbein appointment. But just in case something changes that appointment, here is a recommendation that costs nothing. Heartvalvesurgery.com is Dr. Bavaria and Dr. Desai who are also major specialists in this area and have done a few YouTube films on this subject. The one thing that got to me is that they have done literally hundreds of these operations and said that a patient should look for a doctor who has done at least 100 per year, every year. Reason being, that any number under that means less experienced Doctors and Hospitals attending staff may not be familiar with emergencies that could pop up. Seems reasonable to me. Good luck.