Dr Loh performs a wide range of adult cardiac and thoracic procedures, including coronary artery bypass grafting, valve repairs or replacements, and minimally invasive lung cancer surgeries. Skilled in congenital heart procedures, he also uses minimally invasive techniques to close defects such as atrial septal defects. In Singapore, he leads the largest series of aortic valve sparing root replacements, offering improved outcomes for patients with aortic root aneurysms. As Chairman of the Chapter of Cardiothoracic Surgery at the Academy of Medicine, Singapore, he also contributes to specialist training and hospital care as a visiting consultant at major institutions like the National Heart Centre and KK Women’s and Children’s Hospital.