Hello and thank you for using HCM. I carefully read you question and I understand your concern.I will try to explain you something. There are different reasons that might cause increased or faster heart beats.The faster heart beats have to do with rhythm issues. If the beats are fast and regular it might be just a simple sinus tachycardia meaning that your heart rhythm is ok but just beating over 100 for minute. If the rhythm is chaotic it might be a different arrhythmia like atrial fibrillation. The cause of this rhythm issues might be different.Physical or emotional stress, caffeine products might cause increased heart frequency so its mandatory to avoid them. All sow, there are different pathology s like anemia, thyroid gland problems like hyperthyroidism that might be the cause of fast heart beats. In very rare cases the usage of stains for high cholesterol might give rhythm problems, but im not sure if this is your case. It might be just an episode related to a stressed day or it might happen again. If it will happen again, If I was your treating doctor I will recommend some simple examinations. I will recommend an electrocardiogram, a cardiac echocardiography and of course a rhythm holter monitoring for 24 h. This is necessary to have a full view of your mean frequencies during day and night. After these, a full blood chek up to exclude anemia or thyroid problems. Doing this examinations helps us understand if it is necessary to treat this high frequencies or not. Hope I was helpful. Wish you good health. Best regards.