Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Santer, D; Kramer, A; Kiss, A; Aumayr, K; Hackl, M; Heber, S; Chambers, DJ; Hallström, S; Podesser, BK.
St Thomas' Hospital polarizing blood cardioplegia improves hemodynamic recovery in a porcine model of cardiopulmonary bypass.
J Thorac Cardiovasc Surg. 2019; 158(6): 1543-1554.
Doi: 10.1016/j.jtcvs.2018.11.104
Web of Science
PubMed
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- Führende Autor*innen der Med Uni Graz
- Hallström Seth
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- Abstract:
- Cardiac surgery demands highly effective cardioprotective regimens. We previously demonstrated improved cardioprotection with "polarized" compared with "depolarized" arrest. This study uses a clinically relevant porcine model of cardiopulmonary bypass to compare the efficacy of blood-based St Thomas' Hospital polarizing cardioplegia (STH-Pol-B) with blood-based St Thomas' Hospital hyperkalemic cardioplegia (STH2-B). Pigs were monitored and subjected to normothermic cardiopulmonary bypass, cardiac arrest via antegrade cold (4°C) blood cardioplegia (STH2-B, control group: n = 6 or STH-Pol-B, study group: n = 7), and global ischemia (60 minutes) followed by on-pump reperfusion (60 minutes) and subsequent off-pump reperfusion (90 minutes). At termination, tissue samples were taken for analysis of high-energy phosphates, ultrastructure, and microRNAs. The primary endpoint of this study was creatine kinase-muscle/brain release during reperfusion. Creatine kinase-muscle/brain was comparable in both groups. After pigs were weaned from cardiopulmonary bypass, hemodynamic parameters such as mean arterial pressure (P = .007), left ventricular systolic pressure (P < .001), external heart work (P = .012), stroke volume (P = .015), as well as dp/dtmax (P = .027), were improved with polarizing cardioplegia. Wedge pressure was significantly lower in the study group (P < .01). Energy charge was comparable between groups. MicroRNA-708-5p was significantly lower (P = .019) and microRNA-122 expression significantly (P = .046) greater in STH-Pol-B hearts. Polarized cardiac arrest offers similar myocardial protection and enhances functional recovery in a porcine model of cardiopulmonary bypass. Differential expression of microRNAs may indicate possible new ischemia-reperfusion markers. These results confirm the noninferiority and potential of polarized versus depolarized arrest. Copyright © 2018 The American Association for Thoracic Surgery. Published by Elsevier Inc. All rights reserved.
- Find related publications in this database (Keywords)
- cardioplegia
- St Thomas' Hospital No. 2
- polarizing cardioplegia
- animal study
- micro RNA
- ischemia-reperfusion
- cardiopulmonary bypass
- blood cardioplegia
- cardioprotection