I am 33y/o and have had several short reoccurances of A-fib triggered at night as well as with a deep inhilation most recently, which self converted back to sinus rhythm after 60min. and a hot shower. I have been using a albuterol inhaler for many years. Could the affects of improper inhaler use have caused my A-fib??? I am following a cardiologists regimine of cardizem but am relucant to start flecanide as I have no occurance of flutter/a-fib since stopping the albuterol.  With elimination of causes, can my heart repair itself via consistent exercise and lifestyle modification???? or are the improper eletrical channels permanent and ever-present???
Lifestyle modifications help to improve risk factors for heart disease. However, cardiac arrhythmia like Atrial Fibrillation needs to be evaluated and find the reason for it. The electrical channels in the heart can not be changed with lifestyle modification, but it helps specially if you lose weight that will help the heart to work less. The heart muscle repairs when you have a good aerobic exercise.