Myocardial acceleration during isovolumic contraction as a new index of right ventricular contractile function and its relation to pulmonary regurgitation in patients after repair of tetralogy of Fallot

Myocardial acceleration during isovolumic contraction (IVA) by Doppler tissue imaging has been proposed to be a new index of right ventricular contractile function that is unaffected by ventricular shape or loading conditions. We sought to assess the use of IVA to evaluate right ventricular contract...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of the American Society of Echocardiography 2004-04, Vol.17 (4), p.332-337
Hauptverfasser: Toyono, Manatomo, Harada, Kenji, Tamura, Masamichi, Yamamoto, Fumio, Takada, Goro
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Myocardial acceleration during isovolumic contraction (IVA) by Doppler tissue imaging has been proposed to be a new index of right ventricular contractile function that is unaffected by ventricular shape or loading conditions. We sought to assess the use of IVA to evaluate right ventricular contractile function. In all, 22 pediatric patients with pulmonary regurgitation (PR) after repair of tetralogy of Fallot (TOF) (8 ± 3 years) and 27 age-matched children were examined. The degree of PR (mild, moderate, and severe) for patients with TOF was on the basis of pulsed and color Doppler findings. Using Doppler tissue imaging, the peak myocardial velocities during early diastole, late diastole, systole, and isovolumic contraction were recorded. Compared with healthy children, Doppler tissue imaging velocities for patients with TOF showed decreased myocardial velocities during early diastole ( P = .007), late diastole ( P < .0001), systole ( P < .0001), and isovolumic contraction ( P < .0001). Patients with TOF had a lower IVA when compared with healthy children ( P < .0001). There was a stepwise decrease in the IVA from mild to severe PR. We found a significant relationship between the IVA and the degree of PR ( r = −0.86, P < .0001). The analysis of IVA allows the assessment of right ventricular contractile function for patients with repaired TOF and various degrees of PR.
ISSN:0894-7317
1097-6795
DOI:10.1016/j.echo.2003.12.022