pacemaker

after a pacemaker being put it, having the left arm numb and cold hands, is this normal, pacemaker put in on Friday 2 days after the surgery

[Cleveland Clinic]

Not likely to be normal. If it does not resolve after anesthesia wears out then this may be secondary to arterial supply injury or even brachial plexus injury. I suggest that you mention this to your cardiologist who placed it so that they can trouble shoot this problem. You will need an x-ray of the chest and shoulder and maybe an ultrasound of the arm.