A new algorithm for the management of stable coronary artery disease incorporating CT coronary angiography and fractional flow reserve: how we can improve outcomes and reduce costs

To the Editor: Harper and Ko recently suggested radically changing the way we investigate patients with stable coronary artery disease (CAD), stating that they should initially undergo computed tomography coronary angiography (CTCA), with subsequent stress testing if CTCA shows atherosclerosis.1 To save costs, they recommend excluding stress nuclear myocardial perfusion imaging (MPI) because it has similar accuracy to stress echocardiography and involves ionising radiation.