Abstracts From the Third Annual Medicine & Science in Ultra- Endurance Sports Conference, August 2016, Chamonix, France
Right Ventricle Adaptation After an Endurance Race
Maria Sanz De La Garza, Daniel Brotons Cuixart, Gonzalo Gazioli, Emma Roca, Marta Sitges.
Objective.—Right ventricle (RV) dysfunction and changes in the pulmo- nary pressure has been described in athletes after endurance races. We aimed to understand the changes in the right heart response to endurance exercise, and the effects of the amount of exercise.
Methods.—Echocardiography was performed in 55 healthy adults at baseline and after a three-stage trail race: short (14 km; n = 17); medium (35 km; n = 21); and long (56 km; n = 17). Echocardiographic assessment of the RV was performed with global and separate analysis of the RV basal and apical regions.
Results.—No changes were observed in short-distance runners, RV systolic deformation decreased signi cantly (p < 0.05) after both the medium-length and long races (Δ% RV global strain: -7.6±20.1 and: -8.7±21.8, respectively) with signi cant RV dilatation (Δ% RV volume: +10.6±9.9 and +15.3±12.8, respectively). The RV basal segment made a major contribution to stroke volume during exercise, showing larger increases in size and strain as com- pared to the apex. Various patterns of RV adaptation to exercise, ranging from increases in both RV segmental strains and sizes to an insuf cient increase in size and a decrease in strain, were identi ed; this individual variability was not correlated with prior training.
Conclusions.—An acute RV impairment was demonstrated after a trail-running race, and was related to the amount of exercise. A high inter-individual variability was observed. Differences in RV adaptation patterns were independent of prior training, suggesting the in uence was due to other individual factors.