I made a boo-boo ! It was Chip , not Bubba . I can't remember what the vet called it , but she had me listen . It was an extra " swish " every three beats . Anyway , she had me come in in a couple of weeks and there was no change . We then checked every few months ..... finally it was back to normal ! I had even looked into have a pace maker put in at Purdue U f it had gotten worse ( her suggestion ) ....seems companies give their nearly expired pace makers to vet hospitals ( still good for 8 to 10 years , but not long enough for humans ) . Can't tell you not to worry ... I know you will . You'll feel better when you know the actual diagnosis . Good thoughts your way !!