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The purpose of this study was to find a safe dosing regimen for landiolol, an ultra-short-acting β-adrenergic blocking agent, to rapidly control supraventricular tachyarrhythmias (SVTs) in patients with heart failure (HF). Landiolol is reported to have good effects in the treatment of SVTs after cardiac surgery. We evaluated 52 patients with SVT and symptoms of HF (NYHA class III/IV, 10/42; EF 32 ± 12 %) on admission because of ischaemic disease (n = 10), non-ischaemic cardiomyopathy (n = 32), or valvular disease (n = 10). Paroxysmal/persistent atrial fibrillation and atrial tachycardia were present in 16 (30 %), 23 (45 %), and 13 (25 %) patients, respectively. The patients first underwent conventional therapy with carperitide, dobutamine, or milrinone. Intravenous landiolol was administered at an infusion rate of 1 μg/kg/min and, if no adverse effects developed, the maintenance dose, titrated to HR and blood pressure response, was increased. At an average dose of 10.8 ± 9.4 μg/kg/min, mean HR significantly decreased significantly from 133 ± 27 to 82 ± 15 beats/min (P < 0.01), whereas systolic blood pressure did not differ from baseline to attainment of an effective dose level (105 ± 21 vs. 101 ± 19 mmHg, P = ns). Within 60 min after initiation of therapy, all patients had achieved a 20 % reduction in HR at the maintenance dose. Transient asymptomatic hypotension requiring cessation of landiolol therapy occurred in three patients. Intravenous administration of landiolol was both effective in rapidly controlling HR for up to 24 h and useful as bridging treatment to additional therapy of oral β blockade, pulmonary vein catheter ablation, or cardiac resynchronisation therapy in patients with HF.
Cardiovascular Division, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
This article was published in the following journal.
Name: Heart and vessels
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