Heart Rate Suddenly Increasing
I am a 23 year old male, In decent shape, and don't take much other than a vitamin C and Magnesium compound. Last night I suddenly woke up and felt a strange sensation in my chest, my heart was racing as if I had just done some very intense excercising, lasted about 5 mins of very rapid beating followed by muscle spasms and a general cold feeling. I do not think this is anxiety related because during the episode I was very calm and in control except for my heart, and I have experienced a panic attack before and it did not feel at all similiar. This was at around 3:00 AM. The next day I cant help but notice my heart rate as increased about an average of 20 bpm all around. My resting bpm which was around 70-80 is now around 80-100, and its remaining consistent. I am not sure if this is because of an infection but I do have my supsicious about sinusitis. It is that time of the year when my seasonal allergies give me sinus problems, and the vision in one of my eyes became significantly more blurry, which I think might be sinus related.
Is there certain heart disorders that can cause this? Thanks alot.