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Uptodate Reference Title
Pressure and coronary Doppler tracings
Pressure and coronary Doppler tracings
Pressure and coronary doppler display. Signals show ECG at top, aortic guide pressure (red), coronary pressure wire (yellow), and doppler coronary velocity signal.
FFR: fractional flow reserve is computed from ratio of aortic and coronary pressures; CFR: coronary flow reserve is computed from ratio of hyperemic to rest average peak velocity. Using both pressure and flow; HSR: hyperemic stenosis resistance; HMR: hyperemic myocardial resistance can also be calculated; Pa: pressure, aortic; Pd: pressure distal (guidewire).
