I'm a person who had both GERD and heart surgery, so know exactly why you are concerned.
Congratulations for challenging your issues head on, and using conventional and intelligent methods to get your conditions under control. I have had to have a Nissen Fundoplication for my GERD, as well as heart surgery, so know the confusion.
I learned that I should take my GERD medication exactly as prescribed. Also, I know that eating dinner creates a problem for me with angina. If you can, I'd ask your doctor to prescribe an Endoscopy to make sure your Esophagus is OK, and also request the same to make sure the 70% blockage hasn't increased. Also, you might request a stress test to make sure your heart arteries aren't occluded.
Keep us informed.
Thank you so much for your response. .I had an endarterectomy to remove the blockage in my carotid, It is now clean and has been for over 2 years. I do not have angina either. No heart pain. Just feel the "heaviness" sometimes after eating.