Dan is particularly interested in cardiothoracic and vascular surgery, plastic and reconstructive surgery, surgical management of urinary incontinence, gastrointestinal surgery and surgery of the conducting airways. Dan is Director of Cardiothoracic Surgery at the Royal Veterinary College, a service that delivers surgical therapies for congenital and acquired cardiac disease in dogs and cats. These techniques include valve repair for degenerative mitral valvular disease and congenital mitral and tricuspid valve dysplasia, open patch graft for pulmonic stenosis and palliative shunting for cyanotic heart disease. In addition, we have corrected more complex congenital heart defects in dogs such as tricuspid stenosis, atrioventricular septal defect, double chamber right ventricle and single common atrium.