Influence of the amount of myocardium subtended to a coronary stenosis on the index of microcirculatory resistance. Implications for the invasive assessment of microcirculatory function in ischaemic heart disease

Mauro Echavarría-Pinto1,2,3, MD; Tim P. van de Hoef1,2,3, MD; Sukhjinder Nijjer4, MBBS; Nieves Gonzalo1, MD, PhD; Luis Nombela-Franco1, MD; Borja Ibañez1,2, MD, PhD; Sayan Sen4, MBBS; Ricardo Petraco4, MD; Pilar Jimenez-Quevedo1, MD, PhD; Ivan J. Nuñez-Gil1, MD, PhD; Enrico Cerrato1, MD; Pablo Salinas1, MD; Alicia Quirós1, PhD; Hector M. Garcia-Garcia5, MD, PhD; Antonio Fernandez-Ortiz1,2,6, MD, PhD; Carlos Macaya1,6, MD, PhD; Justin Davies4, MBBS, PhD; Jan Piek3

1. Cardiovascular Institute, Hospital Clínico San Carlos IDISSC, Madrid, Spain; 2. Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain; 3. AMC Heartcenter, Academic Medical Center - University of Amsterdam, Amsterdam, the

Aims: The index of microcirculatory resistance (IMR) is increasingly used to quantify microcirculatory function. However, in normal coronary arteries, resistance increases with the branch

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fractional flow reserveother techniquequantitative coronary angiography

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