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

### input:
Ive been having heart palpitations for a few years now. They seem to come in streaks. But last night while lifting weights, my heart was jumping from about 150 bpm to about 280 bpm for 15-30 seconds and then immediately dropping back down. It felt like a lot of blood was being pulled from my face and head.

### 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 some advises. As you describe my opinion is that we are dealing with a rhythm issue. Someone might feel heart palpitations for different reasons. It may be a simple sinus tachycardia that means that the heart is beating regularly over 100 beats for minute. Its normal resting rate is between 60-100 beat for minute. You may experience palpitations because of extra-sistolyc beats. These is electrical impulses generating from parts of the heart different from normal sinus rhythm. This gives the sensation of an escaped, skipping beat. But there are all sow different rhythm problems like atrial fibrillation ore supra ventricular tachycardia where the heart doesn't beat normal, it suddenly beats fast or in a chaotic way with very high frequencies and this might be what we call atrial fibrillation. My opinion is that lifting weight is not the reason of your palpitations. It's quite known in cardiology that during physical exertion the heart rate raises. Its maximal frequency should go 220 minus your age, and it should slowly go down. But you describe a long history of palpitations and a sudden heart jumping just for some seconds, immediately Chat Doctor.  So, I think that we should see what are these rhythm fluctuations. Does this happen even in a resting situation or only when you exercise? If I was your treating doctor I will recommend a blood analyze, your thyroid hormones, an electrocardiography, echocardiogram and of course a holder monitoring to see your rhythm tendency. Ones we have all these we can say what are these palpitations and how to treat them.These is all for a simple check-up to reduce these episodes in the future. Whish I was helpful. Take good care. Best regards