Tim Koldenhof completed his medical education at the University of Groningen, graduating in 2019. Following his graduation, he worked in the cardiology department at the Martini Hospital for a period of one year. Currently, he holds the position of a physician-scientist at the University Medical Centre of Groningen. Under the guidance of Professor Rienstra and Dr. Tieleman, Tim focuses on investigating heart rate control in patients diagnosed with atrial fibrillation.