July 2017 I had bypass surgery . After surgery, they
I would explain as follows:
Welcome on -Ask a Doctor- service!
I passed carefully through your medical history and would like to explain that the first issue to clarify is your actual cardiac function.
For such purpose I would recommend discussing with your attending cardiologist on the possibility of performing a cardiac ultrasound.
The next issue to investigate would be your pulmonary function status. It would be necessary to go through pulmonary function tests (PFT) and pulmonary imagine tests (chest CT).
Your need to discuss with you doctor on the above mentioned issues.
Hope to have been helpful to you!
My opinion as follows:
Thank you for the additional information!
Yes acid reflux and hiatal hernia can mimic this clinical situation too.
For this reason, I recommend trying omeprazole or any other PPI and see if your situation improves. If this is the case, a fibrogastroscopy may be needed.
I would also advice performing a cardiac ultrasound, in order to evaluate your cardiac function and structure.
It is also important checking inflammation tests (complete blood count, PCR, ESR).
Regarding SOB when lying down, it could be related to airway obstruction too. As you have suffered from sleep apnea, checking pulmonary function tests is necessary too.
You should discuss with your doctor on the above tests.
Hope to have clarified some of your uncertainties!
Wishing all the best,