Left Atrial Volume, Cardiorespiratory Fitness, and Diastolic Function in Healthy Individuals: The HUNT Study, Norway

Background Left atrial ( LA ) size and cardiorespiratory fitness ( CRF ) are predictors of future cardiovascular events in high‐risk populations. LA dilatation is a diagnostic criterion for left ventricular diastolic dysfunction. However, LA is dilated in endurance athletes with high CRF , but little is known about the association between CRF and LA size in healthy, free‐living individuals. We hypothesized that in a healthy population, LA size...