Isoproterenol-induced flow responses in mammary and vein bypass grafts

Coronary flow reserve early and late after minimally invasive coronary artery bypass grafting in patients with totally occluded left anterior descending coronary artery

“…7,8 Indirect measurements of the postoperative flow reserve have been obtained by means of thallium scintigraphy or radionuclide techniques. 9,10 The use of an intravascular device was introduced in the 1970s, but the most important problem with this catheterbased Doppler system was the large diameter (about 1 mm), which affected blood flow and disturbed the velocity profile. 11 This problem was recently overcome with the introduction of 0.014-and 0.018-inch intravascular Doppler guide wires, which have been shown to provide accurate measurements of coronary flow reserve.…”