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Table 1 Mean values of peak and time to peak twist and untwist-rate at the endocardial level.

From: Cardiovascular magnetic resonance myocardial feature tracking for the measurement of myocardial twist and untwist at rest and during dobutamine stress in healthy volunteers

Mean ± SD Peak twist endocardial (degrees) Time to peak
twist (ms)
Peak untwist-rate endocardial (degrees/s) Time to peak
untwist-rate (ms)
Volunteers at rest 17 ± 11 393 ± 180 -140 ± 58 495 ± 194
Volunteers at 10 mcg of dobutamine 26 ± 7
(p = 0.03)
247 ± 49
(p = 0.007)
-282 ± 100
(p = 0.01)
342 ± 56
(p = 0.03)
Volunteers at 20 mcg of dobutamine 30 ± 15 (p = 0.001) 238 ± 54
(p = 0.003)
-356 ± 179
(p = 0.005)
324 ± 57
(p = 0.01)