Fig. 2.
Measured coronary velocity: raw data and post-processed data. A ComboWire® was used to measure coronary artery velocity signals. a A time window of the measurements of the coronary artery velocity signal measured in patient 1 indicating some variability from cycle to cycle. The cut points of the signal are indicated as empty circles. The differences between cut points present a period Δ of the heart beat. b Filtered coronary velocity cycles for patient 1. Gray lines represent superimposed filtered averaged velocity curves measured for all cycles in patient 1. The block line represents the mean filtered velocity signal. Variation in maximum velocity is indicated by the double-headed arrow. Umin ± δ, mean velocity; Umean ± δ, maximum velocity; Umax ± δ as well as period of the cycle Δ ± δ (arrows).