Preliminary study on assessment of myocardium in pilots by cardiac MRI mapping
10.3760/cma.j.cn113854-20221014-00127
- VernacularTitle:心脏MRI mapping技术在飞行员心肌组织评估中的初步探索
- Author:
Jinlong ZHANG
1
;
Ruijing JIANG
1
;
Hongxia FAN
1
;
Hong FANG
1
;
Lijun WU
1
;
Ping WANG
1
;
Peng SUN
1
;
Xiangsheng LI
1
Author Information
1. 空军军医大学空军特色医学中心医学影像科，北京 100142
- Publication Type:Journal Article
- Keywords:
Myocardium;
Magnetic resonance imaging;
Pilots
- From:
Chinese Journal of Aerospace Medicine
2023;34(3):163-166
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To preliminarily evaluate the myocardium of pilots by noninvasive and radiation free cardiac MRI mapping technology, and to explore its application value in evaluating the myocardium of pilots.Methods:Case-control study was adopted in this study. Pilots and normal personnel who had cardiac MRI in Air Force Medical Center from October of 2020 to July of 2022 were selected, and they were divided into 20-40 years group and >40 years group. The differences of myocardial longitudinal relaxation time T1, transverse relaxation time T2 and T2 * values between pilots and normal personnel at different ages were analyzed and compared. Pilots were divided into groups according to flying hours and aircraft types, and the differences of myocardial T1, T2 and T2 * values among pilots in different flying hours and aircraft types were analyzed and compared. Results:The average myocardial T1 value of pilots [(1 011.18±24.70) ms] was lower than that of normal personnel [(1 025.07±25.74) ms], and the difference was significant ( t=2.10, P=0.040). The myocardial T1 value of pilots >40 years old [(1 006.04±29.15)ms] was lower than that of normal personnel [(1 029.68±20.24) ms], and the difference was significant ( t=2.30, P=0.032). The myocardial T1 value of fighter pilots [(999.04±17.39)ms] was lower than that of the bomber, transporter, helicopter pilots [(1 023.33±25.53) ms], and the difference was significant ( t=2.73, P=0.012). There was no significant difference in myocardial T1, T2 and T2 * values between pilots and nornal personnel aged 20-40 years old; there was no significant difference in T2 and T2 * values between pilots and normal personnel in the age group of >40 years old (all P>0.05). There was also no significant difference in myocardial T1, T2 and T2 * values among the pilots in different flying hours (all P>0.05). Conclusions:The level of cardiomyocyte hypertrophy or myocardial fibrosis in fighter pilots might be lower than that in other aircraft types pilots. Cardiac MRI mapping has potential value in evaluating the myocardium of pilots.
