High Frequency of Microvascular Dysfunction in US Outpatient Clinics: A Sign of High Residual Risk? Data from 7,105 Patients

Figure 2

Sample test for digital thermal monitoring (DTM) of vascular reactivity. A sample screen displays the right finger temperature curve (red), the left finger temperature curve (blue), and the zero reactivity curve (green). The vascular reactivity index (VRI) is taken as the adjusted maximum value of the temperature curve during the reactive hyperemic period. Zero reactivity curve (ZRC) is the green line, calculated based on predicted temperature rebound in the right finger if no reactive hyperemia were elicited by the 5-minute cuff occlusion.