Efficacy of intracoronary administration of a short-acting β-blocker landiolol during reperfusion in pigs.

Abstract:

BACKGROUND:Although β-blockers are used to prevent myocardial ischemia/reperfusion injury, the risk of heart failure has limited β-blocker therapy in patients with acute myocardial infarction. This study evaluated efficacy of intracoronary administration of the short-acting β-blocker, landiolol, during reperfusion in pigs with acute myocardial ischemia. METHODS AND RESULTS:In the non-ischemic model landiolol administered into the left anterior descending coronary artery (LAD) inhibited in a dose-dependent fashion segmental wall thickening (SWT) in the anterior LV wall without altering SWT in the posterior LV wall and without prolonged depression of global LV function except for the highest dose. In the ischemic model with 60 min LAD occlusion followed by reperfusion the medium dose landiolol administered into the LAD 1 min before and for 10 min during reperfusion inhibited initial recovery of SWT in the anterior LV wall but improved SWT in this region and global LV function late after reperfusion. Ultrastructural studies showed inhibition of sub-sarcolemmal bleb formation by treatment with landiolol 10 min after reperfusion associated with the inhibition of CK-MB release and the reduction of infarct size. There was no significant difference in CK-MB release and infarct size between landiolol treatment for 10 min and 180 min during reperfusion. CONCLUSIONS:Selective and brief intracoronary administration of landiolol during reperfusion enhances myocardial salvage without causing deterioration of global LV function.

journal_name

Int J Cardiol

authors

Park H,Otani H,Oishi C,Fujikawa M,Yamashita K,Okazaki T,Sato D,Ueyama T,Iwasaka J,Yamamoto Y,Iwasaka T

doi

10.1016/j.ijcard.2009.07.013

subject

Has Abstract

pub_date

2011-02-03 00:00:00

pages

347-53

issue

3

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(09)00801-8

journal_volume

146

pub_type

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