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Increase in cardiac contractility during puberty.

Goran Milicević1, Nina Smolej Narancić, Robert Steiner

  • 1Department of Cardiology, General Hospital, Sveti Duh, Zagreb, Croatia.

Collegium Antropologicum
|September 17, 2003
PubMed
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During puberty, the heart exhibits distinct diastolic and systolic growth patterns, with significant increases in cardiac contractility observed in healthy boys. This study reveals two simultaneous cardiac growth models during adolescence.

Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Human Physiology

Background:

  • Pubertal development involves significant physiological changes, including cardiac remodeling.
  • Understanding cardiac growth during adolescence is crucial for assessing cardiovascular health.
  • Previous research has indicated changes in heart dimensions during puberty, but detailed analysis of distinct growth patterns is ongoing.

Purpose of the Study:

  • To analyze the pubertal growth of the heart in healthy boys.
  • To compare the growth rates of diastolic and systolic cardiac variables.
  • To correlate cardiac growth with body structure and function development during puberty.

Main Methods:

  • Longitudinal study involving 84 healthy boys, aged 11.5 to 14.5 years.

Related Experiment Videos

  • Utilized echocardiographic, ergometric, and anthropometric measurements.
  • Analyzed growth rates of diastolic and systolic heart dimensions and cardiac contractility.

    • Main Results:

    • Left ventricular diastolic wall thickness increased by 15%, while systolic thickness increased by 36% (p < 0.001).
    • Systolic wall thickening percentage rose from 20% to 41% over 3 years (p < 0.001).
    • Cardiac contractility, preload, and afterload measures showed significant increases, correlating with diastolic and systolic variables.

    Conclusions:

    • The adolescent heart demonstrates distinct diastolic and systolic growth models.
    • Cardiac contractility significantly increases during puberty.
    • These findings suggest a dual-phase growth process for the heart during male adolescence.