Effect of simulated geomagnetic activity on myocardial ischemia/reperfusion injury in rats
Rev. bras. cir. cardiovasc
;
34(6): 674-679, Nov.-Dec. 2019. tab, graf
Article
in English
| LILACS
| ID: biblio-1057497
ABSTRACT
Abstract Objective:
To study the response of myocardial ischemia/reperfusion injury (MI/RI) in rats to simulated geomagnetic activity.Methods:
In a simulated strong geomagnetic outbreak, the MI/RI rat models were radiated, and their area of myocardial infarction, hemodynamic parameters, creatine kinase (CK), lactate dehydrogenase (LDH), melatonin, and troponin I values were measured after a 24-hour intervention.Results:
Our analysis indicates that the concentrations of troponin I in the geomagnetic shielding+operation group were lower than in the radiation+operation group (P<0.05), the concentrations of melatonin in the shielding+operation group and normal+operation group were higher than in the radiation + operation group (P<0.01), and the concentrations of CK in the shielding + operation group were lower than in the radiation + operation group and normal + operation group (P<0.05). Left ventricular developed pressure (LVDP) and ± dP/dtmax in the radiation+operation group were lower than in the shielding + operation group and normal+operation group (P<0.01). Left ventricular end-diastolic pressure (LEVDP) in the shielding + operation group was higher than in the normal + operation group (P<0.05). There was no significant difference in area of myocardial infarction and LDH between the shielding + operation group and the radiation + operation group.Conclusion:
Our data suggest that geomagnetic activity is important in regulating myocardial reperfusion injury. The geomagnetic shielding has a protective effect on myocardial injury, and the geomagnetic radiation is a risk factor for aggravating the cardiovascular and cerebrovascular diseases.
Full text:
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Index:
LILACS (Americas)
Main subject:
Myocardial Reperfusion Injury
/
Magnetic Fields
Type of study:
Prognostic study
/
Risk factors
Limits:
Animals
Language:
English
Journal:
Rev. bras. cir. cardiovasc
Journal subject:
Cardiology
/
General Surgery
Year:
2019
Type:
Article
Affiliation country:
China
Institution/Affiliation country:
Chinese Academy of Sciences/CN
/
The First Affiliated Hospital of Kunming Medical University/CN
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