s the thing...an infection can surely TRIGGER
tachycardia, as can decongestants, caffeine and
albuterol (a steroid inhalent). However, as I'm sure you are already realizing, it is not "normal" for someone to suddenly experience 4 days of prolonged and consistant tachycardia, even with these triggers. The greatest concern is that the infection has somehow affected the heart, which, if not treated, can be very dangerous.