Abstract 4213: Radiation, Contrast Medium and Time Needed for Fractional Flow Reserve Assessment After a Left Heart Catheterization
Objectives: FFR measurement performed at the end of a diagnostic angiogram, allows to obtain functional information on top of the anatomic findings (all-in-one approach). We sought to define the additional dose of Radiation (R), Radiation Time (RT), Contrast Medium (C) and total Time (T) needed to obtain the functional assessment of coronary artery stenoses.
Methods: In 166 patients (mean age: 65±11 years) presenting with an acute coronary syndrome (33%) or stable angina pectoris (SAP), FFR was measured in order to gain functional information in at least one intermediate coronary artery stenosis. The measurements were obtained in duplicate after administration of intracoronary adenosine. The additional dose of R, RT, C and total T needed to obtain the FFR value were carefully measured and expressed per lesions.
Results: 212 lesions (average 1.3 lesions per patient, mean FFR: 0.8±0.1 and mean % diameter stenosis: 53±13 %) were measured. The additional R and C during FFR expressed as percentage of the total diagnostic procedure were 20% (mean: 1895±1540cCycm2) and 22% (mean: 45±28 ml) respectively. The additional % T and RT were 19% (mean: 8.8±4 min) and 19% respectively (mean: 2±1.6 min) (Figure⇓). There was no significant difference on the additional R, RT, C and T during FFR, among STEMI, NSTEMI and SAP patients.
Conclusions: The limited additional dose of Radiation, Contrast and Time required to obtain FFR measurements amply justifies an all-in-one approach (combination of diagnostic angiogram and FFR measurements) instead of performing additional non-invasive testing.