alexa Multifocal Atrial Tachycardia Secondary to Infusion of Dimenhydrinate | Open Access Journals
ISSN: 2155-9880
Journal of Clinical & Experimental Cardiology
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Multifocal Atrial Tachycardia Secondary to Infusion of Dimenhydrinate

Yasin Turker1 and Mehmet Ozaydin2*
1Department of Cardiology, Duzce University, Duzce, Turkey
2Department of Cardiology, Suleyman Demirel University, Isparta, Turkey
Corresponding Author : Dr. Mehmet Ozaydin
Kurtulus Mah, 122. cad. Hatice Halici
Apt. no: 126, 32040, Isparta, Turkey
Tel: (90) 532-413-9528
Fax: (90)246-218-0163
E-mail: [email protected]
Received June 28, 2012; Accepted August 07, 2012; Published August 10, 2012
Citation: Turker Y, Ozaydin M (2012) Multifocal Atrial Tachycardia Secondary to Infusion of Dimenhydrinate. J Clin Exp Cardiolog 3:210. doi: 10.4172/2155-9880.1000210
Copyright: © 2012 Turker Y, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Dimenhydrinate (NN-dimethyl-2-diphenylmetoxyethylamine; 8-Chloro theophyllinate) is a salt of two drugs: diphenhydramine and 8-chlorotheophylline, a chlorinated derivative of the theophylline. It is used therapeutically as an antiemetic, antinauseant and to prevent motion sickness. Diphenhydramine overdose causing hyperpyrexia, status epilepticus, coma, and cardiac arrhytmias has been reported. Additionally, life-threatening ventricular dysrhythmias were reported in a 4 month-old infant intentionally administered an overdose of dimenhydrinate.

Dimenhydrinate (NN-dimethyl-2-diphenylmetoxyethylamine; 8-Chloro theophyllinate) is a salt of two drugs: diphenhydramine and 8-chlorotheophylline, a chlorinated derivative of the theophylline [1]. It is used therapeutically as an antiemetic, antinauseant and to prevent motion sickness [2]. Diphenhydramine overdose causing hyperpyrexia, status epilepticus, coma, and cardiac arrhytmias has been reported [3,4]. Additionally, life-threatening ventricular dysrhythmias were reported in a 4 month-old infant intentionally administered an overdose of dimenhydrinate [5].
We presented an interesting case with chaotic atrial arrhythmia after intravenous infusion of dimenhydrinate. To our knowledge this is the first reported case of an atrial arrhythmia caused by the ingestion of dimenhydrinate.
A 48-year-old female presented with stable angina pectoris. She had no complaints of palpitations or documented arrhythmia. Physical examination and laboratory measurements were all normal. The ECG showed T wave inversion in leads DII, DIII and aVF (Figure 1). Coronary angiography revealed a 90% stenosis of the mid portion of the left coronary artery and a 90% stenosis of the ostium of second large diagonal branch. After the angiographic evaluation, coronary artery bypass graft surgery was planned. The patient developed dizziness and nausea followed after coronary angiography. We suggested that, these symptoms may be associated with radio-opaque substance related vertigo. After than hydration and 50 mg of dimenhydrinate infusion started. Multifocal atrial tachycardia (chaotic atrial tachycardia) developed one hour after the start of infusion (Figure 2). There were no significant differences in systemic hemodynamic parameters (her blood pressure was 130/80 mmHg) although no antiarrhythmic treatment was given. Spontaneous conversion to sinus rhythm occurred after two hours. Prior to infusion of dimenhydrinate she had no symptoms related to arrhythmia. Dimenhydrinate has a faster onset of action and elimination half life (2.5- 4 h) [6]. We did not observe any arrhythmias after we had stopped the dimenhydrinate infusion and no chest pain or ST-T changes have occurred. Therefore, we thought that multifocal atrial tachycardia was caused by dimenhydrinate not ischemia or contrast adverse reaction.
 
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