Know-how with heart. PIETRO BAJONA, MD, PhD Cardiac Surgery Allegheny Dr. Bajona specializes in treating cardiac conditions with the most current minimally invasive techniques. He is the Director of the Hypertrophic Cardiomyopathy Program at AHN. Call (412) DOCTORS to make an appointment doctors.AHN.org/Pietro-Bajona AHN FORBES Know-how with heart. PIETRO BAJONA, MD, PhD Cardiac Surgery Allegheny Dr. Bajona specializes in treating cardiac conditions with the most current minimally invasive techniques. He is the Director of the Hypertrophic Cardiomyopathy Program at AHN. Call (412) DOCTORS to make an appointment doctors.AHN.org/Pietro-Bajona AHN FORBES