my son is 16 years old, and woke up this morning at 3:30 am with a UTI--he felt like he was going to pass out and came to see us (my wife is a former nurse). i walked him back to the bed--his heart rate, according to him, had sped up during the process; but when we laid him in the bed, it slowed down to 46 beats per minute. I am confident that his UTI can be eliminated with AZO Standard; but i am concerned about his heart. i have been reading online that 46 beats per minute is quite normal for a lot of athletes (my son plays soccer and runs track, so he s always running). i know i need to take him to a doctor this week; but is there anything you can say to me to take away my current worries?