Is it true that when receiving a pacemaker shock, it is important not to wear a Nitro patch, as is the case with shocks from a defibrillator, in order to avoid burns (the patches contain aluminum)?

It is not necessary to worry about wearing a Nitro patch at the time of receiving a shock from a pacemaker. The electrical current used in a pacemaker is low and distant enough from the patch for simultaneous use to be allowed.