Ramezani-Aliakbari F, Badavi M, Dianat M, Mard SA, Ahangarpour A. The Effects of Trimetazidine on QT-interval Prolongation and Cardiac Hypertrophy in Diabetic Rats.
Arq Bras Cardiol 2018;
112:173-178. [PMID:
30570065 PMCID:
PMC6371832 DOI:
10.5935/abc.20180248]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 07/23/2018] [Indexed: 12/28/2022] Open
Abstract
Background
Trimetazidine (TMZ) is an anti-ischemic drug. In spite of its protective
effects on cardiovascular system, there is no scientific study on the
usefulness of TMZ treatment for prolonged QT interval and cardiac
hypertrophy induced by diabetes.
Objectives
To evaluate the effects of TMZ on QT interval prolongation and cardiac
hypertrophy in the diabetic rats.
Methods
Twenty-four male Sprague-Dawley rats (200-250 g) were randomly assigned into
three groups (n = 8) by simple random sampling method. Control (C), diabetic
(D), and diabetic administrated with TMZ at 10 mg/kg (T10). TMZ was
administrated for 8 weeks. The echocardiogram was recorded before isolating
the hearts and transfer to a Langendorff apparatus. Hemodynamic parameters,
QT and corrected QT interval (QTc) intervals, heart rate and antioxidant
enzymes were measured. The hypertrophy index was calculated. The results
were evaluated by one-way ANOVA and paired t-test using SPSS (version 16)
and p < 0.05 was regarded as significant.
Results
The diabetic rats significantly indicated increased hypertrophy, QT and QTc
intervals and decreased Left ventricular systolic pressure (LVSP), Left
ventricular developed pressure (LVDP), rate pressure product (RPP), Max
dp/dt, and min dp/dt (±dp/dt max), heart rate, superoxide dismutase
(SOD), glutathione peroxidase (GPx) and catalase in the heart. Treatment
with TMZ in the diabetic animals was significantly improved these parameters
in comparison to the untreated diabetic group.
Conclusions
TMZ improves QTc interval prolongation and cardiac hypertrophy in diabetes.
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