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Changes of Left Ventricular Isovolumic Relazation Time with Growth in Children
Author(s) -
Hayashi Yurika,
Watanabe Koji,
Kishida Kenji,
Haneda Noriyuki,
Iwatani Hajime,
Nishio Toshikazu,
Mori Chuzo
Publication year - 1990
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/j.1442-200x.1990.tb00826.x
Subject(s) - medicine , isovolumic relaxation time , cardiology , ventricular function , diastole , diastolic function , blood pressure , body weight , relaxation (psychology)
We investigated the changes of left ventricular isovolumic relazation time (LVIRT) with growth and the factors influencing them during childhood, in a 10‐year follow‐up stury.We measured the body height(BH), body weight (BW), lean body weight (LBW), heart rate (HR), Blood pressure (BP), left ventricular muscle volume index (LVMVI), and LVIRT corrected by the preceding R‐R interval) IRT/R‐R), of 187 healthy children at 3‐year intervals (6,9,12,15 years old). IRT/R‐R were prolonged with growth in boys and girls. At the ages of 12 and 15, the IRT/R‐R of girls were longer than those of boys. Significant correlation coefficients for IRT/R‐R on systolic and diastolic, BW and LVMVI were 0.28, 0.31, 0.20, 0.28, respectively. These data suggest that(1)IRT/R‐R is mainly determined by the diastolic BP,(2) left ventricular diastolic function of children develops with growth of body size, especially BW, and(3) left ventricular early diastolic function in adolescents isrelated to sexual maturation.