Key result
Intensive aerobic exercise is linked to ~27% higher LVEDV but lower radial peak strain.
Why the study?
High intensity and long-term aerobic exercise may lead to cardiac remodeling reflected in changes of traditional cardiac function parameters and myocardial strain, but quantitative evaluation using non-enhanced cardiac cine MRI is limited.
Does high intensity aerobic exercise alter left ventricular cardiac function and myocardial strain measured by non-enhanced CMR in healthy volunteers?
Cross-Sectional (n=66)
Single-blind
No
Does high intensity aerobic exercise alter left ventricular cardiac function and myocardial strain measured by non-enhanced CMR in healthy volunteers?
Absolute Event Rate: 132.9% vs 104.9%
p-value: p=<0.01
Intensive exercise induces cardiac remodeling detectable by non-contrast CMR, with traditional functional parameter changes being more pronounced than myocardial strain changes.
Feature tracking strain may refine athlete remodeling assessment; leaves open incremental value over traditional parameters.
Purpose: High intensity and longtime aerobic exercise may lead to the remodeling of both left and right ventricles with increased myocardial mass and cavity dilatation,which is mainly reflected in the changes of traditional cardiac function parameters.Feature tracking myocardial strain allows quantitative strain analysis of myocardial functionThe purpose was to quantitatively evaluate traditional cardiac function and feature tracking myocardial strain of exercise-induced ,andMaterials and methods: The study included 67 healthy volunteers (21 ± 2 years of age). The exercise group (n=43) who fulfilled our defined exercise criteria. The control group (n=23) who maintained a basic daily life .Noncontrast enhancement CMR scanning were performed on all the subjects using a 3T MRI scanner .Cvi42 software was used for post-processing . Left ventricular cardiac function and overall globle stress were measured.Results: Cardiac function parameters in the exercise group were significantly higher than those of the control group except for the ejection fractions (EFs) and heart rates (HRs). The GRS peak strain and GLS peak diastolic strain rates of both groups were significantly different (P＜0.05).The GRS peak strains and EFs were partly correlated (R=0.61). The GRS peak diastolic strains and cardiac Indices (CIs) were significantly correlated (R=0.68). The GCS and GRS Peak Strains showed highly negative correlations (R=–0.96). The GCS and GRS time to peak values were also highly correlated (R= 0.87). Conclusion:The initial results showed that Changes in the functional parameters were more obvious than in the myocardial strain parameters, and some strain indices were correlated with the cardiac functional parameters,when the remodeling of the heart occurs.This is a new attempt to quantitatively assessment of Cardiac function and strain by Non-contrast-enhanced magnetic resonance.
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Liang et al. (2021) conducted a cross-sectional in Healthy volunteers (exercise-induced cardiac remodeling) (n=66). Intensive aerobic exercise vs. Basic daily life was evaluated on Left ventricular end-diastolic volume (EDV) (p=<0.01). Intensive aerobic exercise significantly increased left ventricular end-diastolic volume (132.9 vs 104.9 ml) and decreased global radial peak strain (38.4% vs 43.9%) compared to sedentary controls.
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