https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Cardiac repolarization variability in patients with postural tachycardia syndrome during graded head-up tilt https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:12385 Sat 24 Mar 2018 08:18:01 AEDT ]]> Relation between QT interval variability and cardiac sympathetic activity in hypertension https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:13289 2 = 0.31, P = 0.001), with RR variability (r2 = 0.20, P = 0.008), and with systolic blood pressure (r2 = 0.16, P = 0.02). Linear regression analysis identified the former two as independent predictors of QTVN. In conclusion, elevated repolarization lability is directly associated with sympathetic cardiac activation in patients with essential hypertension.]]> Sat 24 Mar 2018 08:16:04 AEDT ]]>