If there's any abnormalities in your ECG and 2d echo. Specialy in 2d echo if any regional wall motion abnormalities present go for angiography to rule out any narrowing or blockade in coronary arteries.
MBBS, MD - Internal Medicine, DM - Cardiology, Fellowship in EP
Avoid CT Angio, it not very accurate after stent. Some breathlessness may be side effect of brilinta. It cannot be stopped. Ask you Dr. about substitutes. Too much diet restrictions also causes palpitations. What is your present diet?
Continue with the regular treatment and go for the follow up as suggested. Keep doing the tests like CBC, ESR, blood sugar, TSH, ECG and urine routine. She can start with some activity (physical exercise is also helpful to keep problems at bay. She can go for a walk every day and do some yoga which is easy and comfortable. You can contact me for Homeopathic treatment if the complaints persist.