Skip to main content

Table 2 Changes in echocardiographic variables at various right atrial pacing rates in 8 healthy anesthetized dogs

From: Influence of heart rate on right ventricular function assessed by right heart catheterization and echocardiography in healthy anesthetized dogs

Variables Baseline
(range: 70 - 112)
120 bpm 140 bpm 160 bpm 180 bpm p*
RVEDA index (cm2/kg0.624) 1.21
(1.09 - 1.30)
1.16
(1.05 - 1.25)
1.10
(0.95 - 1.21)
0.97a,b
(0.96 - 1.03)
0.88a,b,c
(0.76 - 0.96)
 < 0.001
RVESA index (cm2/kg0.628) 0.71 ± 0.1 0.67 ± 0.1 0.64 ± 0.1 a 0.60 ± 0.1a 0.55 ± 0.1a,b,c  < 0.001
RV FACn (%/kg−0.097) 51.8 ± 3.9 51.2 ± 5.9 51.3 ± 6.0 46.6 ± 4.5 46.4 ± 2.9a  < 0.001
TAPSEn (mm/kg0.284) 4.4 ± 0.6 4.1 ± 0.7 3.6 ± 0.6a,b 3.3 ± 0.5a,b,c 2.8 ± 0.5a,b,c,d  < 0.001
RV s’ (cm/s) 6.6 ± 1.0 7.1 ± 1.6 6.9 ± 1.7 6.9 ± 1.6 6.7 ± 1.4 0.345
  1. Data are represented as mean ± standard deviation for normally distributed data or median (interquartile range) for non-normally distributed data
  2. RV FACn right ventricular fractional area change normalized by body weight, RV s’ peak systolic myocardial velocity of the lateral tricuspid annulus, RVEDA index end-diastolic right ventricular area normalized by body weight, RVESA index end-systolic right ventricular area normalized by body weight, TAPSEn tricuspid annular plane systolic excursion normalized by body weight
  3. *P value of the repeated-measures analysis of variance or the Friedman test
  4. aThe value is significantly different from baseline (p < 0.050)
  5. bThe value is significantly different from 120 bpm (p < 0.050)
  6. cThe value is significantly different from 140 bpm (p < 0.050)
  7. dThe value is significantly different from 160 bpm (p < 0.050)