Thanks for your question on Health Care Magic. I can understand your concern. Fluttering sensation with loss of breath are commonly seen in arrhythmia (irregular heart rate). You are also having family history of heart diseases. So better to first rule out cardiac diseases like arrhythmia in your case. So consult doctor and get done 1. Ecg 2. 2d echo 3. Holter monitoring (24 hour continuous monitoring of ecg). If all these are normal then no need to worry for arrhythmia or other heart diseases. Sometimes stress and anxiety can also cause similar symptoms. So avoid stress and tension. Be relax and calm. Don t worry, you will be alright. But better to rule out arrhythmia first. Hope I have solved your query. Wish you good health. Thanks.