First off, the listing on this posting is incorrect. Dr. Matalkah is a pulmonologist not a cardiologist. He specializes in lungs, breathing, sleep apnea, etc. Not only is he a great, qualified physician, he is also a wonderful, friendly person. He will answer any questions and answer any and all questions. He cared for me while I was in the hospital as well as in his office and he is always a gentleman and is very thorough. If you are looking for a great pulmonologist, you can do no better than Dr. Matalkah!