<s>[INST] I get a weird fluttering sensation in my lower chest every now and again sometimes it will come and go every 2 or 3 minutes then will not return for a few weeks. Also I become tired quickly when doing physical work which also brings on the fluttering chest [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Fluttering sensations in chest, Tiredness on physical exertion are characteristic symptoms of arrhythmia (rhythm disturbances in heart). So better to consult cardiologist and get done blood pressure monitoring, ECG, 2d echo and Holder monitoring (24 hours continuous recording of ECG). You may nerd anti arrhythmia Chat Doctor.  Don't worry, you will be alright with all these. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks. </s>