For how long will you have shortness of breath after heart surgery for mitral valve repair if cardiologist says echo looks after surgery.

Post op. If the mitral valve repair was successful, the shortness of breath if due to the mitral regurgitation should be improved post op and get gradually better over the next 6 weeks. The timing will vary depending on the state of the heart and other physical characteristics.
6 months to health. You had mitral surgery repair. The recovery for shortness of breath right after surgery is about 1-2 weeks. You will get your strength back by walking. It will take 6 months to recover and have your heart in good shape for a 21 year old. Hope this helps and remember everyone is different.