Abstract
As inflammation plays an important role in the pathogenesis of neonatal meconium aspiration syndrome (MAS), anti-inflammatory agents including inhibitors of phosphodiesterases (PDE) are increasingly used in the treatment. To evaluate side effects of PDE inhibitors, this study analyzed changes in blood pressure, heart rate (HR) and heart rate variability (HRV) during and after intravenous aminophylline in the animal model of MAS. Oxygen-ventilated rabbits were given meconium intratracheally (25 mg/ml, 4 ml/kg) or saline. Thirty minutes later, the animals were treated by intravenous aminophylline (Syntophyllin, 2 mg/kg) or saline (sham-treated controls). A second dose of the treatment was given 2 h later. During (5 min) and immediately after (5 min) the treatment, and during 5 h after the treatment, mean blood pressure in the femoral artery (MAP), HR and HRV were evaluated. In meconium-instilled animals, increases in MABP, HR, and HRV were observed already 5 min after aminophylline administration, while in saline-instilled animals aminophylline increased HR and caused inconsistant changes in HRV parameters compared to sham-treated animals. Within 5 h after the treatment administration, MAP, HR, and HRV parameters gradually returned to the initial values. Concluding, intravenous aminophylline may lead to acute cardiovascular changes. Thus, if aminophylline is used for treatment of MAS, its possible cardiovascular effects should be considered, particularly in patients with cardiovascular instability.
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Acknowledgments
Authors thank D. Kuliskova and J. Neuschlova for technical assistance. Study was supported by Project “Center of Excellence in Perinatology Research (CEPV II)”No. 26220120036, co-financed from EU sources.
Conflicts of interest: The authors declare no conflicts of interest in relation to this article.
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Mokra, D., Tonhajzerova, I., Mokry, J., Petraskova, M., Hutko, M., Calkovska, A. (2013). Cardiovascular Side Effects of Aminophylline in Meconium-Induced Acute Lung Injury. In: Pokorski, M. (eds) Respiratory Regulation - The Molecular Approach. Advances in Experimental Medicine and Biology, vol 756. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-4549-0_41
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DOI: https://doi.org/10.1007/978-94-007-4549-0_41
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