Hello, my name is Lisa, I am 46 years old and am two and a half days post pacemaker insertion. While I had no cardiac history, I did experience occasional syncope throughout my life, a week ago I went into cardiac arrest with a 12 second pause, hence the pacemaker. My question is this, is it normal to have continuous muscle spasms in the neck, upper back, shoulders, around the trachea , very painfull, and... what causes these spasms? Thank you so much for your reply.