In the left anterior descending coronary artery (LAD), hyperaemic Q was significantly higher (293☑02 mL/min versus 228☗1 mL/min, p=0.004) in controls than in patients. Results: Whole heart hyperaemic Q tended to be higher in controls compared to patients (668☑85 vs 582☑38 mL/min, p=0.068). In 15 controls (41 vessels) and 25 patients (71 vessels), vessel-specific myocardial mass was derived from coronary computed tomography angiography. In 20 controls and 29 patients, measurements were obtained in all three major coronary arteries, thus allowing calculations of Q and R for the whole heart. Methods: In 177 arteries (69 patients: 25 controls, i.e., without identifiable coronary atherosclerosis 44 patients with mild, non-obstructive atherosclerosis), thermodilution-derived hyperaemic Q and total, epicardial, and microvascular absolute resistances (Rtot, Repi, and Rmicro) were measured. Background: Absolute hyperaemic coronary blood flow (Q, in mL/min) and resistance (R, in Wood units ) can be measured invasively by continuous thermodilution.Īims: The aim of this study was to assess normal reference values of Q and R.
0 kommentar(er)
