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Increase in Cardiac Contractility During Puberty
Goran Miličević
Nina Smolej Narančić
Robert Steiner
Pavao Rudan
Sažetak
Pubertal growth of heart was analyzed. Growth rates of »diastolic variables« of heart
size were compared with that of 'systolic', and both with growth intensities of some body
structures and functions that are related to cardiac growth. Longitudinal echocardiographic,
ergometric and anthropometric measurements were performed in 84 healthy
boys, aged 11.5 years at the beginning and 14.5 at the end of study. Diastolic thickness
of left ventricular walls increased by a mean rate of 15% and systolic by 36% (p<0.001).
As a result, percent systolic wall thickening increased from 20% to 41% during the 3
years (p<0.001). Other measures of cardiac contractility increased in the same manner.
Increase in measures of cardiac preload and afterload corresponds to the increase in
heart »diastolic« and »systolic« variables, respectively. The study gave evidences for an
increase in cardiac contractility during puberty. Coexistence of two simultaneous growth
models for pubertal heart: diastolic and systolic, is suggested.
Ključne riječi
growth; puberty; heart; myocardial contractility
Hrčak ID:
28090
URI
Datum izdavanja:
16.6.2003.
Posjeta: 1.175 *