The character of pulmonary and venous hemodynamics chahges in the experimental pulmonary thromboembolism and myocardial ischemia models
- Authors: Evlakhov V.I.1,2, Poyassov I.Z.1,3, Ovsyannikov V.I.1
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Affiliations:
- Institute of Experimental Medicine
- Pavlov First Saint Petersburg State Medical University
- Saint Petersburg State University of Aerospace Instrumentation
- Issue: Vol 19, No 1 (2019)
- Pages: 73-80
- Section: Original research
- URL: https://journals.rcsi.science/MAJ/article/view/15192
- DOI: https://doi.org/10.17816/MAJ19173-80
- ID: 15192
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Abstract
The pulmonary and venous hemodynamics changes were studied in the experimental pulmonary embolism and myocardial ischemia models in acute experiments on anesthetized rabbits in control and after the blockade of α-adrenoceptors with phentolamine. After 1 min of pulmonary thromboembolism the pulmonary artery pressure and pulmonary vascular resistance increased, the pulmonary flow decreased; the superior vena cava flow decreased to a lesser extent than the inferior vena cava one. During 1 min myocardial ischemia the pulmonary artery pressure and flow decreased, pulmonary vascular resistance did not changed; the superior vena cava flow decreased more than the inferior vena cava one. In case of pulmonary thromboembolism after the blockade of α-adrenoceptors the pulmonary artery pressure increased to the same level, as in control animals, the pulmonary vascular resistance was elevated to a lesser extent. The pulmonary artery flow, the venae cava flows and venous return decreased less than in control. In case of myocardial ischemia after the blockade of α-adrenoceptors the pulmonary artery pressure decreased more, than in control animals, the pulmonary vascular resistance had tendency towards decrease, the venae cava flows and venous return decreased more than in control experiments.The differences of the changes of the pulmonary and venous circulation in cases of pulmonary embolism and myocardial ischemia were caused by activation of the adrenergic mechanisms.
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##article.viewOnOriginalSite##About the authors
Vadim I. Evlakhov
Institute of Experimental Medicine; Pavlov First Saint Petersburg State Medical University
Author for correspondence.
Email: viespbru@mail.ru
SPIN-code: 9072-4077
Dr. Med. Sci., Head of the Laboratory of the Physiology of Visceral Systems named acad. K.M. Bykov; Docent of the Department of Normal Physiology
Russian Federation, Saint PetersburgIlya Z. Poyassov
Institute of Experimental Medicine; Saint Petersburg State University of Aerospace Instrumentation
Email: ilpoar@yandex.ru
Dr. Biol. Sci., Senior Research Fellow of the Laboratory of the Physiology of Visceral Systems named acad. K.M. Bykov; Professor of the Department of the Medical Electronics
Russian Federation, Saint PetersburgVladimir I. Ovsyannikov
Institute of Experimental Medicine
Email: vladovs@mail.ru
Dr. Med. Sci., Principal Research Fellow of the Laboratory of the Physiology of Visceral Systems named acad. K.M. Bykov
Russian Federation, Saint PetersburgReferences
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