Heart Rate Effects on Strain and Strain Rate in Healthy Children

Boettler, Petra; Hartmann, Maximilian; Watzl, Karolin; Maroula, E; Schulte-Moenting, Juergen; Knirsch, Walter; Dittrich, Sven; Kececioglu, Deniz

doi:10.1016/j.echo.2005.08.014

Cited by 73 publications

(54 citation statements)

References 22 publications

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“…The effect of the heart rate in early diastole was only modest, while that in late diastole was striking. The heart rate at basal state is unrelated to contractility as measured by strain rate in one study, while isovolumic velocity and acceleration have been shown to reflect increased contractility as a result of the force-frequency relationship in another [25,26] . Contractility and heart rate increase parallel to adrenergic stimuli and may therefore be parallel phenomena based on similar stimuli.…”

Section: Discussionmentioning

confidence: 95%

Atrioventricular Valve Annulus Velocity and Acceleration during Global Hypoxia in Newborn Pigs – Assessment of Myocardial Function

Odland¹,

Kro²,

Edvardsen³

et al. 2009

Neonatology

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Background: Global hypoxia may affect regions of the neonatal heart during systole and diastole differently. Objective: In the first study, the aim was to assess longitudinal myocardial function in newborn pigs during global hypoxia and recovery. In the second study, invasive hemodynamic data were evaluated and compared with tissue velocities and acceleration. Methods: Myocardial Doppler measurements of velocity and acceleration in the atrioventricular valve annuli during global hypoxia were made. Results: In the first experiment, systolic velocity (S), early diastolic velocity (E’) and peak systolic acceleration (pSac) decreased during hypoxia. S, pSac and E’_mva (mitral valve annulus) recovered after reoxygenation, while E’_septal and E’_tva (tricuspid valve annulus) did not. Isovolumic acceleration (IVA) did not reflect systolic dysfunction. In the second experiment, S_mva and pSac_mva declined during hypoxia similarly to maximum dP/dT. E’_mva and E’_tva were correlated with τ and both changed parallel to minimum dP/dT. In the TVA maximum dP/dT and pSac_tva did not change, while S_tva declined. By correcting for heart rate the pattern of alteration in S and pSac became comparable to the changes in E’. Conclusion: Tissue Doppler velocity in systole, diastole and acceleration during rapid ejection reflect hemodynamic changes in the neonatal myocardium during global hypoxia and recovery. S and pSac reflect systolic function, while E’ correlates with τ and mirrors diastolic function.

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Section: Discussionmentioning

confidence: 95%

Atrioventricular Valve Annulus Velocity and Acceleration during Global Hypoxia in Newborn Pigs – Assessment of Myocardial Function

Odland¹,

Kro²,

Edvardsen³

et al. 2009

Neonatology

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“…It has been shown that HR changes in healthy children during growth have an important impact on both systolic and diastolic myocardial strain and also on late diastolic SR calculated from color Doppler myocardial imaging [91]. The impact of high heart rates already mentioned on 2D-strain and SR measurements is of special importance in pediatric patients.…”

Section: Clinical Applications and Future Directions Of Echocardiogramentioning

confidence: 99%

Echocardiographic strain and strain rate imaging — Clinical applications

Dandel¹,

Hetzer²

2009

International Journal of Cardiology

252

211

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“…Tissue Doppler echocardiography (TDE) quantifies wall motion velocity and has already been used during stress and exercise echocardiography [5,6]. A recently published study investigated in a large population of healthy neonates and children the influence of heart rate, body weight, and age on TDE derived parameter [7]. In contrast to TDE, strain rate imaging (SRI) is not influenced by tethering of adjacent segments [8].…”

Section: Introductionmentioning

confidence: 99%