Thermodilution-Based Invasive Assessment of Absolute Coronary Blood Flow and Microvascular Resistance: Quantification of Microvascular (Dys)Function?

<div>Pressure wire and infusion catheter position. In the left panel, a normal circumflex artery is shown. The middle panel shows the pressure wire X, which is placed in the distal coronary artery, and the Rayflow catheter in the proximal artery. The Rayflow is visible by a radiopaque dot at the tip. In this position, the measurement starts. The right panel shows the position of the pressure wire when it is pulled back towards the inner side holes of the Rayflow catheter. Now the infusion temperature is assessed. <i>T</i><sub><i>i</i></sub>: the infusion temperature of the saline as measured at the infusion holes of the Rayflow catheter; <i>T</i>: the distal coronary temperature after complete mixing of blood and saline measured by the pressure wire after calibration to body temperature.</div>

Journal of Interventional Cardiology

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Figure 2: Thermodilution-Based Invasive Assessment of Absolute Coronary Blood Flow and Microvascular Resistance: Quantification of Microvascular (Dys)Function? 

Figure 2 | Thermodilution-Based Invasive Assessment of Absolute Coronary Blood Flow and Microvascular Resistance: Quantification of Microvascular (Dys)Function? 