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Relationship of Inotropic Effects of Stimulation of β1- and β2-Adrenergic Receptors of Isolated Myocardial Fragments with Echocardiography Parameters in Coronary Heart Disease.

Authors :
Afanasiev, S. A.
Kondratieva, D. S.
Muslimova, E. F.
Korepanov, V. A.
Andreev, S. L.
Akhmedov, Sh. D.
Source :
Bulletin of Experimental Biology & Medicine. Sep2024, Vol. 177 Issue 5, p616-620. 5p.
Publication Year :
2024

Abstract

We studied the relationship of inotropic responses of the isolated myocardium to stimulation of β1-and β2-adrenergic receptors (β-AR) with echocardiography parameters in 28 patients with coronary heart disease (CHD). Myocardial fragments (trabeculae of the right atrial appendage) were obtained during coronary artery bypass surgery. The inotropic response of the trabeculae was assessed in an isometric mode. Stimulation of β1-and β2-AR with agonists was performed against the background of preliminary α-AR blockade. In case of preserved ejection fraction, significant inotropic response of the trabeculae (135 (112; 154)% from the initial contraction amplitude) was observed after β1-AR stimulation, while in reduced ejection fraction, its significant increase was observed after β1-AR stimulation (126 (112; 170)% from the initial contraction amplitude). In patients with preserved and reduced ejection fraction, the correlations between the inotropic responses of the trabeculae to β1-and β2-AR stimulation and echocardiography parameters were different. The revealed differences reflect the degree of cardiac remodeling under condition of the studied pathology. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00074888
Volume :
177
Issue :
5
Database :
Academic Search Index
Journal :
Bulletin of Experimental Biology & Medicine
Publication Type :
Academic Journal
Accession number :
180104976
Full Text :
https://doi.org/10.1007/s10517-024-06235-4