Table 3.
Association of heart rate with signal to noise and contrast to noise ratios
| |
Heart rate ≤ 55 bpm (n = 21) |
Heart rate > 90 bpm (n = 14) |
||||
|---|---|---|---|---|---|---|
| β coefficient | 95% CI | p value | β coefficient | 95% CI | p value | |
|
SNR left atrium |
−2.32 |
−5.30, 0.66 |
0.13 |
0.21 |
−3.93, 4.34 |
0.92 |
|
SNR LAA |
−1.41 |
−3.62, 0.80 |
0.21 |
−0.33 |
−3.29, 2.63 |
0.83 |
|
SNR PV |
−2.29 |
−4.42,-0.17 |
0.03 |
−1.06 |
−4.01, 1.88 |
0.48 |
|
CNR LA/Myocardium |
−2.19 |
−5.16, 0.78 |
0.15 |
−0.23 |
−4.35, 3.90 |
0.91 |
|
CNR LAA/Myocardium |
−1.77 |
−4.12, 0.58 |
0.14 |
−0.52 |
−3.67, 2.63 |
0.75 |
| CNR PV/Myocardium | −2.26 | −4.38,-0.14 | 0.04 | −1.10 | −4.04, 1.85 | 0.46 |
Legend: Beta coefficients from multiple linear regression models with the respective SNR or CNR as the dependent variable, and heart rhythm and categorical HR as predictor variables. Results for HR categories presented in this table are compared to the following ‘reference’ HR category: 55 < HR ≤ 90 bpm (n = 66), and adjusted for heart rhythm.