M son is 17 years old and in tremendous physical shape as he is a competitive swimmer.  For the past few months he has had episodes where he feels a nervous flutter in his chest and profuse sweating for a persiod of 20 minutes or so.  The symptoms then subside and he is fine.  Could this be stress related or a cardio issue.
Thanks for your question on Chat Doctor. I can understand your concern. Possibility of stress and anxiety related symptoms are more. But better to rule out cardiac diseases like arrhythmia, valvular heart disease etc. Because these diseases are common in young age group and cause similar episodic symptoms. So get done ECG and 2d echo first. If both are normal then no need to worry about cardiac diseases. Your son is mostly having anxiety related symptoms. So better to consult psychiatrist and get done counseling sessions. Try to identify stressor in his life and start working on its solution. He may need anxiolytic Chat Doctor.  So ask him to avoid stress and tension, be relaxed and calm. Don't worry, he will be alright. Hope I have solved your query. Wishing him good health. Thanks.