“…11C-labelled 11CO, which has a high affinity to bind with the haemoglobin in the cells to form 11C-carboxyhaemoglobin, has been used to estimate changes in the cardiac blood pool [190]. 13NH3 was found to be useful for measuring myocardial perfusion [191,192], and lSFDG proved excellent for measuring myocardial glucose metabolism [193]. If blood flow and oxygen delivery into the myocardium are reduced, the activity of beta oxidation and the citric acid cycle decreases or ceases entirely.…”