Background
Methods
Study population
HRD pulse sequence sampling scheme determination
Study procedure
CMR acquisition
Image analysis
Statistical analysis
Results
Healthy volunteers (n = 13) | Patients with AF (n = 30) | |
---|---|---|
Gender, female | 3 (23.08 %) | 10 (33.33 %) |
Age (years) | 53 ± 18 | 54 ± 13 |
Height (m) | 1.70 ± 0.06 | 1.69 ± 0.09 |
Weight (kg) | 76.35 ± 14.97 | 76.20 ± 15.21 |
BMI (kg/m2) | 26.17 ± 3.87 | 26.46 ± 3.94 |
Average HR (bpm) | 62 ± 9 | 88 ± 20 |
HR fluctuation (bpm) | 3 ± 3 | 12 ± 9 |
Left atrium volume (cm3) | 139.03 ± 45.05 | 158.42 ± 50.55 |
EF (%) | 63.17 ± 7.00 | 49.19 ± 11.83 |
EDV (ml) | 98.17 ± 19.96 | 87.81 ± 26.85 |
ESV (ml) | 36.46 ± 10.96 | 44.94 ± 19.51 |
SV (ml) | 61.71 ± 13.13 | 42.89 ± 16.61 |
MM (g) | 86.12 ± 24.59 | 85.94 ± 25.01 |
CO (l/min) | 3.97 ± 1.17 | 3.58 ± 1.10 |
LGE positive subject | 0 | 10 |
Comparison between HRD and fixed sampling scheme in normal sinus rhythm with high heart rate
Comparison between systole and diastole T1 mapping in healthy volunteers
Diastole | Systole |
P value | |
---|---|---|---|
Overall LV myocardium native T1 times (ms) | 1247.73 ± 31.86 | 1231.06 ± 31.45 | <0.01 |
Overall LV myocardium post-contrast T1 times (ms) | 544.94 ± 52.80 | 563.80 ± 56.89 | <0.01 |
Overall LV pre-contrast blood T1 times (ms) | 1832.76 ± 61.76 | 1784.49 ± 82.02 | <0.05 |
Overall LV post-contrast blood T1 times (ms) | 352.87 ± 49.15 | 365.53 ± 51.70 | <0.01 |
Overall LV ECV (%) | 25.11 ± 1.63 | 24.60 ± 1.58 | =0.047 |
Comparison among different HRD/fixed sampling schemes and systole/diastole combination T1 mapping in patients with AF
1 | 2 | 3 | 4 |
P value | |
---|---|---|---|---|---|
Diastole with fixed scheme | Systole with fixed scheme | Diastole with HRD scheme | Systole with HRD scheme | ||
Overall LV myocardium native T1 times (ms) | 1272.76 ± 39.30 | 1263.29 ± 40.71 | 1311.00 ± 44.51 | 1304.83 ± 52.01 | 1 vs. 2: <0.01 |
3 vs. 4: <0.05 | |||||
1 vs. 3: <0.01 | |||||
2 vs. 4: <0.01 | |||||
Overall LV myocardium post-contrast T1 times (ms) | 543.42 ± 57.04 | 551.07 ± 57.49 | 571.37 ± 66.16 | 588.94 ± 64.31 | 1 vs. 2: <0.05 |
3 vs. 4: >0.05 | |||||
1 vs. 3: >0.05 | |||||
2 vs. 4: <0.05 | |||||
Overall LV pre-contrast blood T1 times (ms) | 1819.40 ± 136.03 | 1797.49 ± 132.23 | 1796.32 ± 132.02 | 1766.30 ± 133.51 | 1 vs. 2: >0.05 |
3 vs. 4: >0.05 | |||||
1 vs. 3: >0.05 | |||||
2 vs. 4: >0.05 | |||||
Overall LV post-contrast blood T1 times (ms) | 359.61 ± 53.34 | 366.06 ± 52.73 | 393.03 ± 61.73 | 400.18 ± 64.13 | 1 vs. 2: <0.01 |
3 vs. 4: >0.05 | |||||
1 vs. 3: <0.05 | |||||
2 vs. 4: <0.05 | |||||
Overall LV ECV (%) | 26.70 ± 2.45 | 26.41 ± 2.73 | 28.02 ± 3.48 | 27.18 ± 3.36 | 1 vs. 2: >0.05 |
3 vs. 4: >0.05 | |||||
1 vs. 3: <0.05 | |||||
2 vs. 4: <0.05 |
Patient 1 | Patient 2 | Patient 3 | ||||||
---|---|---|---|---|---|---|---|---|
P value |
P value |
P value | ||||||
Diastole | A: fixed | Native T1 (ms) | 1294.67 ± 16.50 | A vs. B: <0.01 | 1233.83 ± 25.09 | A vs. B: <0.05 | 1268.80 ± 34.85 | A vs. B: <0.01 |
B: 1st HRD | Native T1 (ms) | 1353.30 ± 36.55 | B vs. C: >0.05 | 1241.17 ± 16.08 | B vs. C: >0.05 | 1289.57 ± 13.29 | B vs. C: >0.05 | |
C: 2nd HRD | Native T1 (ms) | 1342.60 ± 18.12 | A vs. C: <0.01 | 1245.07 ± 11.98 | A vs. C: <0.05 | 1289.07 ± 16.05 | A vs. C: <0.01 | |
A: fixed | ECV (%) | 23.12 ± 0.22 | A vs. B: <0.01 | 22.28 ± 1.00 | A vs. B: <0.01 | 27.25 ± 0.34 | A vs. B: <0.01 | |
B: 1st HRD | ECV (%) | 25.51 ± 0.88 | B vs. C: >0.05 | 24.96 ± 0.24 | B vs. C: >0.05 | 28.49 ± 0.37 | B vs. C: >0.05 | |
C: 2nd HRD | ECV (%) | 25.47 ± 1.14 | A vs. C: <0.01 | 25.60 ± 0.97 | A vs. C: <0.01 | 28.50 ± 0.21 | A vs. C: <0.01 | |
Systole | A: fixed | Native T1 (ms) | 1283.30 ± 34.76 | A vs. B: <0.01 | 1209.90 ± 33.24 | A vs. B: <0.01 | 1249.73 ± 39.49 | A vs. B: <0.01 |
B: 1st HRD | Native T1 (ms) | 1345.1 ± 23.40 | B vs. C: >0.05 | 1246.37 ± 33.92 | B vs. C: >0.05 | 1274.70 ± 17.68 | B vs. C: >0.05 | |
C: 2nd HRD | Native T1 (ms) | 1339.57 ± 25.75 | A vs. C: <0.01 | 1250.80 ± 36.09 | A vs. C: <0.01 | 1256.10 ± 17.91 | A vs. C: <0.05 | |
A: fixed | ECV (%) | 23.57 ± 0.62 | A vs. B: <0.05 | 22.86 ± 2.58 | A vs. B: <0.05 | 27.01 ± 1.50 | A vs. B: <0.05 | |
B: 1st HRD | ECV (%) | 24.41 ± 1.74 | B vs. C: >0.05 | 23.74 ± 0.56 | B vs. C: >0.05 | 27.13 ± 0.65 | B vs. C: >0.05 | |
C: 2nd HRD | ECV (%) | 24.76 ± 0.52 | A vs. C: <0.05 | 23.56 ± 1.21 | A vs. C: <0.05 | 27.14 ± 0.90 | A vs. C: <0.05 |