Effects of Ivabradine on Left Ventricular Systolic Function and Cardiac Fibrosis in Rat Myocardial Ischemia-Reperfusion Model.
10.4068/cmj.2018.54.3.167
- Author:
Han Byul KIM
1
;
Young Joon HONG
;
Hyuk Jin PARK
;
Youngkeun AHN
;
Myung Ho JEONG
Author Information
1. Division of Cardiology, Chonnam National University Hospital, Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea. hyj200@hanmail.net
- Publication Type:Original Article
- Keywords:
Myocardial Ischemia;
Myocardial Reperfusion Injury;
Echocardiography;
Ivabradine
- MeSH:
Administration, Oral;
Animals;
Echocardiography;
Fibrosis*;
Follow-Up Studies;
Heart Rate;
Heart Ventricles;
Myocardial Ischemia;
Myocardial Reperfusion Injury;
Rats*;
Reperfusion Injury
- From:Chonnam Medical Journal
2018;54(3):167-172
- CountryRepublic of Korea
- Language:English
-
Abstract:
We evaluated the effects of Ivabradine on left ventricle (LV) ejection fraction (EF) and LV infarcted tissue in the rat myocardial ischemia-reperfusion model. Twenty rats were randomly assigned to group 1 (ischemia-reperfusion, no treatment, n=10) and group 2 (ischemia-reperfusion + Ivabradine 10 mg/kg, n=10). Ivabradine was administered for 28 days. Echocardiography was performed at 7 days and at 28 days after the induction of ischemia-reperfusion injury. Cardiac fibrosis induced by ischemia-reperfusion injury was evaluated by Masson's trichrome staining. The infarct size was quantified using the Image J program. At the 28-day follow-up, LVEF was significantly higher (36.02±6.16% vs. 45.72±2.62%, p<0.001) and fractional shortening was significantly higher (15.23±2.84% vs. 20.13±1.38%, p<0.001) in group 2 than group 1. Delta (28 day minus 7 day) EF was significantly higher in group 2 than group 1 (−4.36±3.49% vs. 4.31±5.63%, p<0.001). Also, heart rate (beats/min) was significantly lower in group 2 than group 1 (251.67±25.19 vs. 199.29±31.33, p=0.025). Group 2 had a smaller infarct size (40.70±8.94% vs. 30.19±5.89%, p<0.01) than group 1 at 28-day follow-up. Oral administration of Ivabradine could improve LV systolic function and reduce infarcted tissue area in rat myocardial ischemia-reperfusion model.
