I took a work experience in Cardiology, it was very interesting to see some of the works of a doctor by shadowing them. We had 1 senior consultant and 2 junior doctors along with 2 medical students and 2 from sixth form, in a group for a few consecutive days. The afternoon was spent in outpatient where specific cases were discussed. It helped of course, to understand some specifics such as the cardiovascular examination of patients, ECGs and echocardiography, you also get a chance to talk to a consultant about their work, so if you have some questions/doubts you can definitely clear them up. The experience was definitely helpful and I recommend going cardiology, other than the severe cases it was quite a good way to step up my ideas about doctors in general.