Figure 1: Linear regression analysis: inverse proportionality between TTFC (Total Timi Frame Count) and TMBS (Total Myocardial Blush Score). In hypertensive patients, a worsening of microvascular functionality is demonstrated by the simultaneous alterations of the two parameters, analyzing the modalities through which the contrast mean fulfills coronary vessels during the injection (TTFC) and is washed out from microvessels, afterwards (TMBS).