Hello and thank you for using HCM.I carefully read your question and I understand your concern . I will try to explain you something and give you my opinion . You should know that this fast heart beats has to do with rhythm issues. There might be different electrical rhythm issues that might coise fast heart beats.It might be just a sinus tachycardia meaning that the heart beats in normal sinus rhythm over 100 beat for minute.It might be an extra sistolic beat that you experience like a palpitation kr fllutering sensation.Or it might be a different kind of arythmia like atrial fibrillation , supra ventricular tachycardia ect meaning that the heart beats in a chaotic way not in normal sinus rhythm. The causes might be different to simple stres to different pathologys like anemia , hyperthyroidism , electrolyte imbalances, cardiovascular disease. If I was your treating doctor I will recommend some examination like an electrocardiogram, a cardiac echo, a full blood analyze to exclude anemia , hyperthyroidism and a holter rhythm monitoring to evaluate your rhythm tendency. Only after this we can better understand what we are dealling whith and how to treat it. Hope I was helpfull. Best regards, Dr.Ervina.