Brief: This would need proper checkup and diagnosis. Detailed: Hello, Thanks for Writing to Health Care Magic and putting trust in us regarding your Health related query. I am Dr. Saleha and I have read your message in detail, I understand your concern and will try to help you in this. I am sorry to know about the symptoms you are having, increased heart rate and throbbing is very non specific symptom, it is not necessary that you are having any actual arrhythmia or Cardiac problem it might just be anxious tachycardia or may have any other reason. So to rule in or rule out any cardiac involvement this will need a proper checkup and few tests like ECG , Holters(if needed) etc. I would suggest you to visit your doctor and discuss problem with him. Your problem will involve checking of your B.p, Pulse rate, Pulse rhythm (regular or irregular?) and ECG, if all these things are normal then you might be asked to take a simple inderal or any other rate control tablet to control heart rate when it gets rapid. If they find an arrhythmia then the treatment depends upon arrhymia type and severity. I would suggest you not to panic and visit your doctor as soon as possible to get a check-up investigations and proper diagnosis to see why is this problem cause.It seems to be quite a simple case though. I hope this answers your question.If you have more questions, I am happy to answer. Wish you lasting health. Regards. Dr.Saleha Saeed.