Hello and thank you for using HCM.I carefully read your question and understand your concern. But you should not worry,its nothing serious. As you describe, my opinion is that it might be a rhythm issue. Someone can feel strong heart beats for different reasons. It may be a simple sinus tachycardia. This means that the heart is beating faster than 100 beats for minute. Its normal range in a resting condition is between 60-100 beats for minute. When it goes up you may feel a strong heart beat in your chest that gives you a discomfort and a sensation like all your body, your head and ears are beating too. Another reason for this sensation might be what we call an ekstrasystol.This are electrical heart impulses that generates in some parts of heart different from normal sinus rhythm.This generate an escaped beat that the person feels like jumping ore bumping .It gives the sensation like a beat is skipping,may experience palpitations or an anxiety sensation.This extrasistoles may happen from different reasons from simple emotional stress to other pathologies like anemia,hyperthyroidism ect. In fact we don t expect tachycardia or extra-systolis to give you headaches or dizziness. This headache,dizziness and even your ear ringing might be a heart pressure problem. It might be to low or to high blood pressure for what you are used too. So i will recommend you to measure your blood pressure during this episodes. So, if I was your treating doctor I will recommend some examinations like a blood analysis to exclude anemia,the thyroid hormones,an electrocardiogram, echo cardiography and of course a holter monitoring for your rhithm and your blood pressure.This will help us to document and see what happens with heart rhythm and pressure. Wish I was helpful.Take good care.Best regards