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Objective  The objective of the study is to identify the predominant determinants of arterial stiffness as assessed by pulse-wave-velocity (PVW) amongst various 24-hour ambulatory blood pressure monitoring (ABPM) parameters in Indian hypertensive subjects.  Method  Subjects of both genders between 18-60 years with hypertension and who were either drug naïve or on stable anti-hypertensive treatment for at least three months were included in the study. All subjects underwent clinical evaluation with a medical history, biochemical investigations, and assessment of arterial stiffness by PWV along with 24-hour ABPM.  Results  We found the males were younger than females amongst hypertensive cohort (41.53 ± 10.89 years vs. 52.2 ± 5.17 years, respectively; p=0.001) and had shorter duration of hypertension (41.42 ± 49.14 months vs. 87.8 ± 74.55 months, respectively; p=0.012) and had lower 24-hour average pulse pressure (aPP; 49.1 ± 7.8 mm Hg vs. 57.83 ± 8.92 mm Hg, respectively; p=0.001) at baseline. Younger people (<40-years) as compared to those >40-years of age had the lower carotid-femoral (cf) PWV (972.8 ± 125.0 cm/sec vs. 1165.0 ± 208.4 cm/sec, respectively; p=0.001) and average brachial-ankle (ba) PWV (1413.7 ± 160.4 cm/sec and 1640.0 ± 227.1 cm/sec, respectively; p=0.001). Bivariate analysis revealed that amongst all the 24-hour ABPM parameters, 24-hour aPP had the strongest correlation (r=0.414, p=0.003) with arterial stiffness as assessed by PWV. Also, statistically significant correlation was found in age group <40 years between cf-PWV and both 24-hour aPP (r=0.54, p=0.025) as well as night-time aPP (r=0.59, p=0.013)  Conclusion  We conclude that 24-hour aPP showed the strongest correlation with arterial stiffness parameters and best correlated with arterial stiffness variables amongst 24-hour ABPM parameters, especially amongst subjects <40 years of age. The pulsatile blood pressure (BP) was a better predictor of aortic PWV than the continuous part of BP.

Predictors of Arterial Stiffness Amongst the 24-Hour Ambulatory Blood Pressure Variables in Hypertensive Patients