한빛사논문
Dong-Hyuk Cho MD, PhDa,∗, Sung Min Ko MD, PhDb,∗, Jung-Woo Son MDa, Eung Joo Park MSc, Yong Sung Cha MDd
aDivision of Cardiology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
bDepartment of Radiology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
cDepartment of Biostatistics, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
dDepartment of Emergency Medicine and Research Institute of Hyperbaric Medicine and Science, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
*Drs. Cho and Ko contributed equally to this work.
Address for correspondence: Dr. Yong Sung Cha, Department of Emergency Medicine, Yonsei University Wonju College of Medicine, Ilsan-ro 20, Wonju 26426, Republic of Korea.
Abstract
Objectives
This study sought to evaluate the prevalence and patterns of late gadolinium enhancement (LGE) after carbon monoxide (CO) poisoning using cardiac magnetic resonance (CMR) imaging (CMRI) and transthoracic echocardiography (TTE).
Background
In acute CO poisoning, cardiac injury can predict mortality. However, it remains unclear why increased mortality and cardiovascular events occur despite normalization of CO-induced elevated troponin I (TnI) and cardiac dysfunction.
Methods
Patients with acute CO poisoning with elevated TnI were evaluated. CMRI was performed within 7 days of CO exposure and after 4 to 5 months. Patients were divided into LGE (n = 72; 69.2%) and no-LGE (n = 32; 30.8%) groups.
Results
In the LGE group, 39.4%, 4.8%, and 25.0% of patients exhibited midwall, subendocardial, and right ventricular insertion point injury, respectively. Diffuse injury was observed in 22.1% of patients, and 67.6% of the 37 patients who underwent follow-up CMRI showed no interval change. On TTE, baseline left ventricular ejection fraction and global longitudinal strain were significantly deteriorated in the LGE group; serial TTE within 7 days indicated that only left ventricular global longitudinal strain remained significantly deteriorated. Three cases of mortality occurred in the LGE group during the 1-year follow-up.
Conclusions
The LGE prevalence in patients with acute CO poisoning with elevated TnI levels, with no underlying cardiovascular diseases and eligible for CMRI, was 69.2%; this proportion primarily comprised patients with a midwall injury. Of the 37 patients who underwent follow-up CMRI, most chronic phase images showed no interval change. Myocardial fibrosis detected on CMR images was related to acute myocardial dysfunction and subacute deterioration of myocardial strain on TTE. (Cardiac Magnetic Resonance Image in Acute Carbon Monoxide Poisoning; NCT04419298)
Key Words : carbon monoxide poisoning, complications, heart, cardiac magnetic resonance imaging, transthoracic echocardiography
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