1. Pijls NH, Van Gelder B, Van der Voort P, Peels K, Bracke FA, Bonnier HJ, el Gamal MI (1995) Fractional flow reserve. A useful index to evaluate the influence of an epicardial coronary stenosis on myocardial blood flow. Circulation 92:3183–3193
2. Sen S, Escaned J, Malik IS, Mikhail GW, Foale RA, Mila R, Tarkin J, Petraco R, Broyd C, Jabbour R, Sethi A, Baker CS, Bellamy M, Al-Bustami M, Hackett D, Khan M, Lefroy D, Parker KH, Hughes AD, Francis DP, Di Mario C, Mayet J, Davies JE (2012) Development and validation of a new adenosine-independent index of stenosis severity from coronary wave-intensity analysis: results of the ADVISE (adenosine vasodilator independent stenosis evaluation) study. J Am Coll Cardiol 59:1392–1402
3. Härle T, Bojara W, Meyer S, Elsässer A (2015) Comparison of instantaneous wave-free ratio (iFR) and fractional flow reserve (FFR)—first real world experience. Int J Cardiol 199:1–7
4. Härle T, Meyer S, Bojara W, Vahldiek F, Elsässer A (2017) Intracoronary pressure measurement differences between anterior and posterior coronary territories. Herz 42:395–402
5. Härle T, Luz M, Meyer S, Kronberg K, Nickau B, Escaned J, Davies J, Elsässer A (2017) Effect of coronary anatomy and hydrostatic pressure on intracoronary indices of stenosis severity. JACC Cardiovasc Interv 10:764–773