title: Quantitative assessment of regional right ventricular myocardial velocities in awake dogs by Doppler tissue imaging: repeatability, reproducibility, effect of body weight and breed, and comparison with left ventricular myocardial velocities.
abstract: Right ventricular myocardial (RVM) motion is poorly documented. The objective of this study was to determine the variability of RVM velocities by tissue Doppler imaging (TDI) in healthy dogs (study 1), to analyze RVM motion in a large healthy canine population (study 2), and to compare the results with those obtained for the left ventricular free wall. Six healthy Beagle Dogs were monitored in study 1, and 64 healthy dogs of 14 different breeds were monitored in study 2. Velocities were recorded in 2 segments (basal and apical) of the right and left myocardial walls. In study 1, 36 TDI examinations were performed for 4 days, whereas a single TDI examination was performed on each dog in study 2. All velocity profiles included 1 positive systolic wave and 2 negative diastolic waves. The lowest intraday and interday coefficient of variation values of the right TDI variables were observed at the base (3.5-16.1%). The variability of the right apical velocities was much higher, with most coefficient of variation values > 15%. RVM velocities were higher in the basal than in the apical segments (P < .001) and were higher than the left velocities of the corresponding segment (P < .01). Body weight and breed had an effect on only a few right and left TDI variables. TDI provides a repeatable and reproducible method for evaluating basal RV function in the dog. These data also demonstrate the heterogeneity of the myocardial velocities between the left and the right ventricles and between the base and the apex.
authors.affiliation: Unité de Cardiologie d'Alfort, Ecole Nationale Vétérinaire d'Alfort, 7 Avenue du Général de Gaulle, 94704 Maisons-Alfort, France. vchetboul@vet-alfort.fr
authors.forename: Valérie
authors.initials: V
authors.lastname: Chetboul
authors.forename: Carolina Carlos
authors.initials: CC
authors.lastname: Sampedrano
authors.forename: Vassiliki
authors.initials: V
authors.lastname: Gouni
authors.forename: Didier
authors.initials: D
authors.lastname: Concordet
authors.forename: Thierry
authors.initials: T
authors.lastname: Lamour
authors.forename: Jacques
authors.initials: J
authors.lastname: Ginesta
authors.forename: Audrey P
authors.initials: AP
authors.lastname: Nicolle
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Pouchelon
authors.forename: Herve P
authors.initials: HP
authors.lastname: Lefebvre
mesh_terms: D000375:Aging / Q000502:physiology; D000818:Animals; D001835:Body Weight / Q000502:physiology*; D004285:Dogs / Q000145:classification* / Q000502:physiology*; D015150:Echocardiography, Doppler / Q000662:veterinary*; D005260:Female; D006262:Health; D008297:Male; D009200:Myocardial Contraction / Q000502:physiology*; D015203:Reproducibility of Results; D012727:Sex Characteristics; D013997:Time Factors; D016276:Ventricular Function; D016277:Ventricular Function, Left / Q000502:physiology; D016278:Ventricular Function, Right / Q000502:physiology; D014851:Wakefulness / Q000502:physiology*