It depends: There are several degrees of heart block. Third degree heart block usually causes very slow heart rates and can cause fainting or lightheadedness and is usually treated with a pacemaker. Lesser degrees of heart block usually cause no symptoms. It is ok to fly with a pacemaker but bring your pacemaker card with you as you may set off a metal detector. The low dose x-ray will image the battery.
Answered 3/28/2015
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