<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello. I am female, 41 yrs. Old, w no previous history of heart problems. I have had infrequently and randomly over the past couple of weeks a sensation that my heart was beating a little faster than usual, accompanied by a feeling of a flutter, or a bubble pushing upwards, which disappears instantly. My heart also skips a beat at this time. What is going on w my heart? I have no dizziness, nor lightheadedness.  <response>: Dear Mrs, You describe elevated heart rate, which is usually benign and can be caused by many reasons, such as stress, over-tiredness etc. You also describe some kind of arrhythmia, which can be benign, if is not very frequent, and can have same causes. If you have a stressful period, I would advise you, try to regulate your lifestyle, have a healthy sleep, and everything will normalize gradually. If you see no improvement, I would advise you to see your doctor, to perform an ECG, and some labs, such as serum electrolytes, He, thyroid tests. Wishing you a good health 