The ultrasound anytime is OK No risk with that. Arrythmia will stop you suddenly. People who do these tests aren't going to be TOO critical of them. They get well Paid for doing them. Some make a living doing nothing else.' Good, and Timely medication is what keeps you alive, as well as surgery., where Indicated. Multiple bypass pilots have continued to fly since about 1988.. Tests are just tests with stress You went OK THAT time. They Don't FIX anything .It's like revving a car engine UP. Next time you do it a conrod may let Go, You may also suffer a stroke. 2 types. Blockage and haemorrhagic in the Brain. and blood clots in various parts of your body. Drink enough WATER. Live a healthy lifestyle IF you want to keep on flying . Don't carry excess fat in the wrong places . Keep your blood pressure under control.. (medication) Avoid stress if you can. Nev