### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I have been put on pristatins for high colestral but last night I had a very fast heartbeat and I stayed up untill 02:20 worrying about it. It sudenly increased and was beating like a machine gun for about 2 minutes then went back to just being fast. I managed to get off to sleep at about 03:00 and this morning my pulse was 84bpm will I be alright now or will it happen again?

### output:

Hello and thank you for using Chat Doctor. 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 It's mandatory to avoid them. All sow, there are different pathologies 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 I'm 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 happens 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 holder 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 check up to exclude anemia or thyroid problems. Doing these 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.