Journal: European Heart Journal

Article Title: Diastolic pressure ratio: new approach and validation vs. the instantaneous wave-free ratio

doi: 10.1093/eurheartj/ehz230

Figure Lengend Snippet: Virtual instantaneous wave-free ratio. A ‘virtual’ catheterization laboratory was created by feeding pre-recorded pressure tracings into a Philips Volcano S5i console. The electrocardiogram and aortic pressure signal (Pa) passed through an arbitrary waveform generator (AWG) into the console, while the distal coronary pressure signal (Pd) passed through an AWG first into a Philips Volcano Primewire Prestige and finally into the console. In this way pressure tracings could be analysed post hoc for instantaneous wave-free ratio then compared against diastolic pressure ratio. Comparing the ‘virtual’ instantaneous wave-free ratio value to the number saved by the console during live recording demonstrated excellent agreement between real-time and post hoc instantaneous wave-free ratio analyses, thereby validating the technique. dPR, diastolic pressure ratio; iFR, instantaneous wave-free ratio.

Article Snippet: The electrocardiogram and aortic pressure signal (Pa) passed through an arbitrary waveform generator (AWG) into the console, while the distal coronary pressure signal (Pd) passed through an AWG first into a Philips Volcano Primewire Prestige and finally into the console.

Techniques: