Assessment of left and right ventricular parameters in healthy Korean volunteers using cardiac magnetic resonance imaging: change in ventricular volume and function based on age, gender and body surface area

Abstract

The clinical utility of cardiac magnetic resonance imaging (CMR) is growing and is being used predominantly as a means of measuring ventricular function. The normal reference range of ventricular function may vary based on age, sex and ethnicity. At present, most CMR reference values for healthy individuals have been reported from Western countries. The intent of this study was to investigate the normal CMR reference range for left ventricular (LV) and right ventricular (RV) parameters in healthy Koreans. Healthy volunteers between the ages of 20-70years without any history of cardiovascular disease or associated risk factors were prospectively recruited to be a part of this study. A total of 124 patients were recruited for this study. Steady-state free precession pulse sequences were used to obtain the cine images for LV and RV volume analysis. All parameters were analyzed based on age and gender, and normalized to body surface area (BSA). LV volume, mass and cardiac output were significantly greater in males than in females. However, all of these parameters which are associated with BSA and gender differences disappeared when corrected for BSA. RV volume was less in females even after the data was normalized for BSA. LV and RV volumes normalized for BSA gradually decreased with greater age, whereas the ejection fraction increased with age, thus maintaining the stroke volume index and cardiac index. LV and RV volumes, mass and function values for a healthy population largely depend on BSA and should be evaluated after normalization by BSA. LV parameters show no difference based on gender, but RV volume is less in the female. Greater age is associated with less ventricular volume, suggesting the possibility of volume sensitivity in the elderly.