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Updated: Oct 6, 2026

Murine Isolated Heart Model of Myocardial Stunning Associated with Cardioplegic Arrest
Published on: August 6, 2015
Effect of aminophylline preperfusion on digoxin-induced cardiac arrest in isolated frog heart
P Muthu1, M S Krishnamoorthy, T S Kumaravel
1Department of Pharmacology and Environmental Toxicology, Dr. A.L.M. P.G. Institute of Basic Medical Sciences, University of Madras,Taramani, India.
Abstract:
Digoxin (DGN) and aminophylline (theophylline ethylenediamine, APH) being frequently prescribed cardioactive drugs, the present study investigated the effect of APH (10(-4) M) preperfusion on DGN-cardiotoxicity employing the isolated frog heart preparation. The mean DGN perfusion time (sec) and mean DGN exposure (microgram/10 mg heart wt.) for cardiac arrest were the parameters studied. APH preperfusion caused a significant elevation in both the parameters, signifying that it afforded protection against DGN-cardiotoxicity. This protective effect was not observed with the preperfusion of ethylenediamine (EDA) instead of APH, which led to the inference that the protective effect of APH was solely due to its theophylline component. The present finding that APH-pretreatment might modulate DGN-cardiotoxicity, of considerable pharmaco-toxicological interest.
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