Our mom just had a pacemaker put in she is 86 yrs old with stage 4 COPD, Congestive heart failure and advanced Demensia she had the pace maker put in 4 days ago the Demensia seems worse since but she is not wheezing like before she is in oxygen 24 /7 the reason they put the pacemaker in was because she has a blockage we are baffled why her breathing seems so much better can you explain