To inhibit frostbite, you need to make sure that your extremities are covered and protected from the cold. The plastic tent or suit should help with this. Your head radiates an incredible amount of heat away from your body. So, if your t-shirt is long enough, cut off any extra material...
While the risk of occurrence may be low, the consequences could be serious. If a patient unknowingly puts their heart device into "magnet mode," a defibrillator could fail to treat a fast heartbeat condition called ventricular tachycardia, which can be deadly. A pacemaker could lose its ability...