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Background  Sinus tachycardia coupled with high-dose catecholamine is common after cardiopulmonary bypass (CPB). The present study assessed the hemodynamic efficacy and safety of combination therapy using low-dose β 1 -selective adrenergic blocker (landiolol) and inotropes.    Methods  This was a retrospective, single center, self-comparison study at post-anesthesia care unit within a tertiary care center. The study included adults who underwent cardiac surgery with CPB and received landiolol between April 2007 and November 2011. We assessed hemodynamic data prior to and 1 h after initiation of landiolol therapy.    Results  We evaluated 11 patients who were administered 2.6 ± 1.3 μg/kg/min (mean ± SD) landiolol with sinus tachycardia and received catecholamine therapy after on-pump cardiovascular surgery. Landiolol administration led to a significant reduction in heart rate (HR; 112.4 ± 5.8 vs 126.0 ± 7.6 beats/min,  p  < 0.001), and a significant increase in stroke volume index (SVI) assessed by pulmonary artery catheterization (22.4 ± 5.4 vs. 18.9 ± 4.2 mL/m 2 ,  p  = 0.04). Only one patient showed no HR reduction, whereas seven patients showed decreased HR and increased SVI (64, 95% confidence interval: 30–98%). Moreover, all five patients who received high-dose catecholamine support showed improved hemodynamics. In terms of safety, no patients required cessation of landiolol therapy.    Conclusions  Low-dose landiolol therapy may safely decrease HR and improve hemodynamics among patients with sinus tachycardia receiving catecholamine treatment after cardiovascular surgery.    Trial registration  This study is retrospective. Registration number: 11. Duration of registration: April 2007~November 2011.

Use of low-dose β1-blocker for sinus tachycardia in patients with catecholamine support following cardiovascular surgery: a retrospective study