My Wife Has Undergone Angioplasty 99 Percent Blockade In Right

My wife has undergone angioplasty 99 percent blockade in right artery, 1 stent placed on 7th April. Afterward she is mostly feeling week and exhausted. Has frequent acidity issues ( gas) which weaken further and even pain in left shoulder . How to avoid acidity. She takes normal prescribed fruits and low fat diet .