Diesel Exhaust Fluid (DEF) is an emissions control liquid required by modern diesel engines. It is injected into the exhaust stream. DEF is never added to diesel fuel. It is a non-hazardous solution of 32.5% urea in 67.5% de-ionized water.
Side effects from cardiac stress testing may include. Palpitations, chest pain, myocardial infarction, shortness of breath, headache, nausea or fatigue. Adenosine and dipyridamole can cause mild hypotension. As the tracers used for this test are carcinogenic, frequent use of these tests carries a small risk of cancer.
But, as with any medical procedure, it does carry a risk of complications, including: 1  Allergic reaction. You could be allergic to the radioactive dye that's injected into a vein in your hand or arm during a nuclear stress test, but this is rare and reactions are usually mild. 2  Abnormal heart rhythms (arrhythmias).