Skip to main content

Table 1 Left atrial volumes, deformation parameters and heart rate (HR) at rest and during supine exercise with 50 and 100 Watts (W); mean ± standard deviation.

From: Left atrial dynamics during in-scanner exercise: a CMR myocardial feature tracking study

  Rest 50W 100W Rest vs. 50W Rest vs. 100W 50W vs. 100W
     P value
HR [beats/min] 59.6 ± 12.4 93.8 ± 14.8 116.8 ± 12.3 < 0.001 < 0.001 < 0.001
V.max [ml] 65.7 ± 18.7 65.4 ± 21.0 68.4 ± 23.5 0.903 0.94 0.979
V.p-ac [ml] 35.9 ± 11.3 31.2 ± 17.8 31.6 ± 13.7 0.375 0.39 0.742
V.min [ml] 26.0 ± 11.6 16.8 ± 8.6 19.7 ± 9.6 0.014 0.113 0.45
LAEF total [%] 61 ± 9 75 ± 7 71 ± 8 < 0.001 0.013 0.23
LAEF passive [%] 44 ± 14 55 ± 13 54 ± 9 0.059 0.085 0.976
LAEF booster [%] 27 ± 25 43 ± 17 37 ± 17 0.079 0.248 0.475
LA Reservoir Function
Es [%] 33.3 ± 14.1 41.8 ± 13.5 40.5 ± 14.5 0.063 0.089 0.487
SRs [s-1] 1.3 ± 0.5 1.9 ± 0.6 2.0 ± 0.7 0.003 < 0.001 0.93
LA Conduit Function
Ee [%] 21.1 ± 11.2 26.6 ± 9.5 25 ± 12.4 0.052 0.21 0.576
SRe [s-1] -1.0 ± 0.3 -1.6 ± 0.5 -1.6 ± 1.0 < 0.001 0.024 0.979
LA Booster Pump Function
Ea [%] 12.2 ± 6.2 15.2 ± 7.7 15.5 ± 4.6 0.281 0.178 0.611
SRa [s-1] -0.9 ± 0.4 -1.5 ± 0.7 -1.8 ± 0.9 0.008 0.002 0.73
  1. HR, heart rate; V.max., maximum left atrial volume; V.p-ac, left atrial volume prior to left atrial contraction; V.min., minimum left atrial volume; LAEF, left atrial emptying fraction; E, strain; SR, strain rate. Bold p values indicate a significance level < 0.05 as determined by Student's paired t-test.