hi sir ,thanks for contacting us...first of all,plz don t be sad...I can understand what stress you would be going through...it s not easy to see our loved ones in so much trouble,n worrying s a part of it... 1. your baby has spine problems which would be the primary reason for uti,coz that causes abnormal bladder reflexes,leading to recurrent Utis..... ( vicious cycle) actually 2. when ever there is fever ,heart rate goes up and it s directly proportional....Fever of 105 worries me,but jam not so worried the high heart rate now...so next time if you feel your baby is febrile ( 101 *f) I want u to do supportive measures like tepid sponging and paracetamol suppository (per rectal) 200 mg every 8 hrs and aim to kp fever down( high fever can affect the brain and trigger febrile fits , though not affect the heart usually ) 3. uti here needs to be treated and so the doctors are right to wait,bcoz these are elective surgeries usually when it presents in this age and a month or so should be ok to wait. 4. high heart rates are worrisome if the child has a primary high rate problems without other associated issues like fever,infection etc.....we call it SVT ( supra ventricular tachycardia) coz that s the commonest ,but ur child has fever leading to high heart rate, so there is nothing to worry... ,continue your care with same doctor and any further queries get back to us. regards, Dr sowmya