My resting heart rate ranges from 55-60 bpm. if i get surgery with general or spinal anesthesia can having a low resting heart rate (no congenital heart disease or arrhythmia. except benign palpitations) put me at risk of cardiac arrest?

If you don't have a history of heart block or other episodes of severe bradyarrythmias ( very slow heart rhythms) your resting heart rates of 55-60 are not predisposing you to cardiac arrest during anesthesia or surgery more than the general population. In addition your heart is closely monitored by the anesthesiologist who can reverse bradyarrthmia with IV meds.