I'm 2 1/2 months post-op and have developed this weird breathing issue. Im taking Coreg CR and Lisinipril for BP. Every once in awhile I just have to take a huge deep breath. I dont get winded or short of breath. I do my cardio just fine. Doctors says its not a side effect of the meds and that since my heart is still healing that the deep breath issue will go away on its own. I had a enlarged heart prior to my AVR and Im guessing with the heart muscle reshaping itself my body is getting use to a smaller heart pumping blood. Anyway, Im curious if anyone have some similar happen to them.