(A) Correlation between SPWV and VPWV, dashed line = line of unity solid line = regression line (B) Bland-Altman plot of agreement between SPWV and VPWV dashed line = 95% CI solid line = mean difference. SPWV, Sphygmocor pulse wave velocity; VPWV, Vicorder ... (A) Correlation between SPWV and VPWV, dashed line = line of unity solid line = regression line (B) Bland-Altman plot of agreement between SPWV and VPWV dashed line = 95% CI solid line = mean difference. SPWV, Sphygmocor pulse wave velocity; VPWV, Vicorder pulse wave velocity. Elizabeth A Ellins et al. Open Heart 2017;4:e000645 ©2017 by British Cardiovascular Society