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 some advises. My opinion as cardiologyst is that we are dealling whith a rhythm issue. You might experience fast heart beats or pounding sensation for different reasons. It may be a simple sinus tachycardia.This mean that your heart beats over 100 beat for minute.Its normal range should be between 60-100 beat for minute in resting situation.It may happen for different reasons from simple emotional stres to different pathologys like anamia ,hyperthyroidism ect. This pounding sensation might happen because of extrasistoles.This are electrical impulses that generates from different parts of the heart different from that of a normal sinus rhythm.This couses an ectopic heart beat that you feel like a skipped beat or as a palpitation Extrasistoles might happen for the same reasons as sinus tachycardia.All sow thay might be frequent in ischemic heart disease or in patient after an heart attack becouse of changes of the heart muscle. In fact,you take medications to prevent this rhithm problems. Bisoprolol is a medication that gets down your heart frequency and ekstra systolic beats.But if you feel your fast heart beasts and this begins to interfere with your normal daily life it means that the medication might be insufficient. So,Bisoprolol helps you not to feel this heart beats but if you do it means that you need to do a simple chek up to see whats happening whith an electrocardiogram and a holter monitoring.After judging the results we might talk for the treatment Hope I was helpful.Wish you good health.Best regards