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

### input:
LATELY MY HEART HAS STARTED BEATING SO HARD SOMETIMES IT FEELS LIKE I HAVE BEEN RUNNING OR GOT REALLY SCARED. NOTHING SEEMS TO HELP IT. MY BLOOD PRESSURE REMAINS NORMAL BUT MY HEART RATE GOES UP TO HIGH 90S, AND IT IS USUALLY IN THE 50-60 RANGE. DO I NEED TO GET WORRIED ABOUT THIS, BECAUSE RIGHT NOW IT IS SCARING ME TO DEATH!

### output:

Hello and thank you for using Chat Doctor. 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 noise fast heart beats. It might be just a sinus tachycardia meaning that the heart beats in normal sinus rhythm over 100 beats for minute. It might be an extra systolic beat that you experience like a palpitation KR filtering sensation. Or it might be a different kind of arrhythmia like atrial fibrillation, supra ventricular tachycardia etc meaning that the heart beats in a chaotic way not in normal sinus rhythm. The causes might be different to simple stores to different pathologies 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 holder rhythm monitoring to evaluate your rhythm tendency. Only after this we can better understand what we are dealing with and how to treat it. Hope I was helpful. Best regards, Chat Doctor. 