Is irregular breath gonna go away once i do hiatal hernia surgery?

One thing ive noticed is that my cardio is horrible,even tho i train boxing ive noticed that when running i often get shortness of breath and my hearth start beating really fast to the point it hurts my throat and chest and thats way before people that never train and smoke do,the only fix to that is having break every 10-5 minutes but i was wondering if surgery would fix that,also how is it post surgery? Do you get better cardio immidietly or does it take time