Role of age on transmitral flow velocity patterns in assessing left ventricular diastolic function in normal infants...

Area of Science:

• Pediatric Cardiology
• Diastole Function Assessment
• Cardiac Physiology

Background:

• Left ventricular diastolic function is crucial for cardiac health.
• Understanding age-related changes in diastolic properties is essential for diagnosing pediatric heart conditions.
• Previous research has indicated developmental variations in cardiac parameters during childhood.

Purpose of the Study:

• To investigate the developmental trajectory of left ventricular diastolic properties in children.
• To determine the age at which early diastolic function parameters reach adult-like values.
• To elucidate the relationship between early diastolic function and cardiac relaxation processes in pediatric populations.

Main Methods:

• Echocardiographic assessment of diastolic function.
• Measurement of early (E) and late (A) diastolic wave velocities and their integrals.
• Longitudinal tracking of diastolic parameters in a cohort of children.

Main Results:

• Peak E wave velocity and flow velocity integral of early diastole significantly increased with age, reaching older children's values by 36 months.
• Peak A wave velocity and flow velocity integral of atrial contraction showed minimal age-related changes.
• The observed changes in E wave parameters suggest significant maturational alterations in left ventricular diastolic properties.

Conclusions:

• Age-related increases in early diastolic function parameters are primarily driven by changes in the E wave.
• These findings highlight the importance of the relaxation process in pediatric left ventricular diastolic development.
• Diastolic echocardiographic parameters, particularly the E wave, serve as sensitive indicators of cardiac maturation in children.