Skip to main content

Table 3 Synchrony parameters pre- and post-PVR (n = 36)

From: Impact of surgical pulmonary valve replacement on ventricular strain and synchrony in patients with repaired tetralogy of Fallot: a cardiovascular magnetic resonance feature tracking study

Parameter Pre-PVR Post-PVR P-value
Left ventricle
Longitudinal strain
 Maximum difference in time-to-peak 315 ± 185 351 ± 196 0.33
 Standard deviation of time-to-peak 121 ± 73 139 ± 82 0.23
 Cross-correlation delay 301 ± 218 340 ± 242 0.39
Circumferential strain: base
 Maximum difference in time-to-peak 233 ± 172 151 ± 120 0.01
 Standard deviation of time-to-peak 89 ± 63 58 ± 48 0.02
 Cross-correlation delay 217 ± 182 107 ± 77 0.0001
Circumferential strain: mid
 Maximum difference in time-to-peak 124 ± 75 107 ± 55 0.02
 Standard deviation of time-to-peak 49 ± 27 43 ± 20 0.15
 Cross-correlation delay 106 ± 113 77 ± 53 0.13
Circumferential strain: apex
 Maximum difference in time-to-peak 58 ± 46 47 ± 44 0.27
 Standard deviation of time-to-peak 28 ± 22 23 ± 21 0.26
 Cross-correlation delay 99 ± 146 42 ± 24 0.04
Right ventricle
Longitudinal strain
 Maximum difference in time-to-peak 249 ± 176 337 ± 170 0.02
 Standard deviation of time-to-peak 97 ± 70 128 ± 64 0.02
 Cross-correlation delay 258 ± 171 254 ± 179 0.91
Circumferential strain: base
 Maximum difference in time-to-peak 361 ± 198 265 ± 155 0.01
 Standard deviation of time-to-peak 136 ± 70 99 ± 59 0.004
 Cross-correlation delay 342 ± 285 341 ± 286 0.56
Circumferential strain: mid
 Maximum difference in time-to-peak 214 ± 133 268 ± 179 0.11
 Standard deviation of time-to-peak 96 ± 55 101 ± 66 0.73
 Cross-correlation delay 268 ± 216 263 ± 224 0.93
Circumferential strain: apex
 Maximum difference in time-to-peak 95 ± 84 129 ± 97 0.047
 Standard deviation of time-to-peak 43 ± 37 60 ± 43 0.03
 Cross-correlation delay 119 ± 148 126 ± 145 0.82
  1. Values expressed as mean ± standard deviation in ms