Table 3

Rate of device failure reported in each study.

Study lead authorPressure wire failure (%)Microcatheter failure (%)
Menon10 (6/58)2 (1/58)
Ali0 (0/96)5 (5/96)
Wijntjens0 (0/32)6 (2/32)
Fearon0 (0/223)6.2 (13/223)
Pouillot2 (2/123)12 (15/123)
Overall2 (8/519)7.1 (32/519)
  • The overall weighted mean rate of device failure is higher for microcatheters than pressure wires.

  • FFRMC, microcatheter fractional flow reserve; FFRPW, pressure wire fractional flow reserve; PW, pressure wire.