tokens: Left atrial volumes were greater in old compared with young subjects ( maximal : 31 + / - 10 cm3 / m2 vs 24 + / - 8 cm3 / m2 , p = 0 . 02 ; at onset of atrial systole : 23 + / - 8 cm3 / m2 vs 15 + / - 5 cm3 / m2 , p = 0 . 0002 ; minimal : 13 + / - 5 cm3 / m2 vs 9 + / - 4 cm3 / m2 , p = 0 . 001 ) .