Training-induced enlargement of the heart is balanced between the left and right atria and ventricles
KeywordsCardiac Magnetic Resonance Dilate Cardiomyopathy Endurance Training Cardiac Magnetic Resonance Imaging Atrial Volume
It is well known that long term endurance training induces morphological changes of the left ventricle. Few studies have investigated the effects of training on the volumes of the right and left atria and the right ventricle. Different pathologies can cause an enlargement of the chambers of the heart, e.g. dilated cardiomyopathy. We hypothesized that an enlargement of a healthy heart caused by long term endurance training should be well balanced between the left and right side.
The aim of this study was to investigate if long tem endurance training can cause a balanced enlargement between the left and right atrium and the left and right ventricle.
Eighteen elite triathletes (6 female) and 27 healthy normal subjects (12 female) underwent cardiac magnetic resonance imaging (CMR). Left and right end-diastolic volume (LVEDV, RVEDV) and left and right atrial volumes (LA, RA) were calculated from short-axis images using planimetry. Mann-Whitney non-parametric test was used to compare atrial and ventricular volumes between groups. Linear regression was performed to assess the relationship between LVEDV and RVEDV and between LA and RA.
This study has shown that long term endurance training induces a balanced enlargement of the left and right atrial and ventricular dimensions in both males and females.
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