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Heart rate effects on strain and strain rate in healthy children

Petra Boettler1, Maximilian Hartmann, Karolin Watzl

  • 1Department of Pediatric Cardiology, Children's Hospital, Freiburg, Germany. petra.mehwald@web.de

Journal of the American Society of Echocardiography : Official Publication of the American Society of Echocardiography
|November 9, 2005
PubMed

Insights

This study establishes reference values for myocardial strain and strain rate in healthy children. Heart rate significantly impacts these measurements, requiring consideration for accurate assessment of pediatric ventricular function.

Area of Science:

  • Pediatric Cardiology
  • Echocardiography
  • Cardiovascular Physiology

Background:

  • Myocardial Doppler echocardiography allows evaluation of regional ventricular function using strain (S) and strain rate (SR).
  • Clinical application of these regional parameters in pediatric cardiology presents challenges.
  • Establishing normative data is crucial for interpreting these measurements in children.

Purpose of the Study:

  • To establish reference values for systolic and diastolic myocardial S and SR in healthy children across a wide age range.
  • To evaluate the influence of demographic and echocardiographic parameters on S and SR.
  • To specifically assess the impact of heart rate on S and SR in healthy children.

Main Methods:

  • Utilized myocardial Doppler echocardiography to assess regional strain (S) and strain rate (SR).
  • Included a large cohort of healthy children spanning a broad age spectrum.
  • Analyzed the relationship between S, SR, and various demographic/echocardiographic factors, with a focus on heart rate.

Main Results:

  • Established normative reference values for S and SR in systole and diastole for healthy children.
  • Demonstrated significant relationships between demographic/echocardiographic parameters and S/SR.
  • Found that heart rate variations during growth critically affect both systolic and diastolic myocardial S and late diastolic SR.

Conclusions:

  • Heart rate is a key factor influencing myocardial strain and strain rate in growing children.
  • Accurate evaluation of regional myocardial function in pediatric populations necessitates accounting for resting heart rate.
  • The study provides essential reference data for the clinical use of S and SR in pediatric cardiology.

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