Impact of a cuff-based device calibration method on the agreement between invasive and non-invasive aortic and brachial pressure.

´C´ and ´SD´ schemes generated aoSBP levels lower than those recorded invasively (mean errors: 6.9 and 10.1 mmHg); the opposite was found when considering ´Osc´(mean error: -11.4 mmHg). As individuals had higher invasive aoSBP, the three calibration schemes increasingly underestimated aoSBP levels; and viceversa. The ´range´ of invasive aoSBP in which the calibration schemes reach the lowest error level (-5 to 5 mmHg) is different: ´C´: 103-131 mmHg; ´Osc´: 159-201 mmHg; ´SD´:101-124 mmHg. The calibration methods allowed reaching levels of association between aoSBP and cardiac characteristics, somewhat lower, but very similar to those obtained when considering invasive aoSBP. There is no evidence of a clear superiority of one calibration method over another when considering the association between aoSBP and cardiac characteristics. This article is protected by copyright. All rights reserved.