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Table 1 Mean +/- SD values for all peak velocities and TTP velocities, along with their corresponding interstudy reproducibility (mean +/- signed differences between the two scans)

From: Reproducibility of peak and time to peak velocity measurements with a high resolution spiral phase velocity mapping (PVM) sequence

 

Peak velocity (cm/s)

Interstudy reproducibility (cm/s)

TTP (ms)

Interstudy reproducibility (ms)

TTP (normalised) (ms)

Interstudy reproducibility (normalised)(ms)

LONGITUDINAL

      

Systolic Peak

5.87±1.89

-0.56±0.87

55.6±10.3

-1.1±6.6

59.9±6.3

-4.5±7.7

Diastolic Peak

-6.50±1.85

0.21±1.54

461.2±39.7

20.6±30.4

483.3±24.1

-3.5±22.2

Atrial-Systolic Peak

-1.66±0.67

0.22±1.08

858.5±137.5

26.6±103.9

869.4±30.6

-1.1±25.6

RADIAL

      

Systolic peak

2.38±0.38

-0.01±0.36

108.5±18.0

-7.1±24.1

123.6±16.1

-13.8±27.4

Diastolic peak

-3.61±0.77

0.20±0.56

457.7±68.5

26.3±35.7

487.2±20.2

1.3±21.3

Atrial-systolic peak

-1.59±0.43

0.14±0.42

865.7±129.3

25.4±88.2

875.9±29.9

3.0±10.9

CIRCUMFERENTIAL

      

1st systolic peak

-3.52±1.50

0.10±0.50

46.8±12.6

2.4±10.2

48.7±9.8

0.9±9.5

2nd systolic peak

1.40±0.83

-0.20±0.48

135.0±19.5

-2.8±13.6

147.4±21.4

-9.5±7.6

  1. TTP values are shown both as ms from the R-wave (columns 4 and 5) and when normalised to a fixed systolic and diastolic length (columns 6 and 7). The variability and the interstudy reproducibility are both greatly improved for diastolic and atrial-systolic TTPs following normalisation.