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ST-Segment Alterations in the Electrocardiogram of Acute Pulmonary Thromboembolism: A Rabbit Model
1Department of cardiology, Shijiazhuang People's Hospital, Heibei Province, China, jeremymijie@126.com, Department of emergency medicine, Shijiazhuang People's Hospital, Hebei Province, China, hezhihonghezh@126.com.
Physiological Research
|September 12, 2024
Summary
Electrocardiogram (ECG) changes in acute pulmonary thromboembolism (PTE) are linked to right heart volume shifts. This study in a rabbit model found elevated biomarkers like B-type natriuretic peptide (BNP) and Troponin I (TNI) in PTE.
Area of Science:
- Cardiovascular Research
- Animal Models of Disease
- Biomarker Discovery
Background:
- Pulmonary thromboembolism (PTE) can cause significant cardiac strain.
- Understanding electrocardiogram (ECG) alterations in acute PTE is crucial for diagnosis and management.
Purpose of the Study:
- To investigate the mechanism of ECG changes in an acute PTE rabbit model.
- To correlate ECG findings with cardiac biomarker levels and myocardial gene expression.
Main Methods:
- Acute PTE was induced in New Zealand white rabbits.
- ECG, coronary angiography, HE staining, and PCR for BNP, TNF-α, and TNI mRNA were performed.
- Plasma D-dimer, BNP, TNF-α, and TNI levels were measured.
Main Results:
- PTE rabbits showed significant ST-T segment variations on ECG, without coronary artery spasm or occlusion.
- Plasma levels of D-dimer, BNP, TNF-α, and TNI were significantly elevated in the PTE group (P<0.05).
- Myocardial expression of BNP, TNF-α, and TNI mRNA was significantly higher in PTE rabbits (P<0.05).
Conclusions:
- ECG ST-T variations in acute PTE correlate with transient right heart volume changes.
- Elevated cardiac biomarkers and specific mRNA expression confirm myocardial stress in PTE.
- The rabbit model effectively mimics key pathophysiological aspects of acute PTE.
