Table 1.
Baseline characteristics of subjects in each group.
| Atrial Fibrillation | Atrial Flutter | p value | SVT | p value | Normal Controls | p value | |
|---|---|---|---|---|---|---|---|
| (n=136) | (n=84) | (n=158) | (n=51) | ||||
| Age (years) | 59 ± 11 | 61 ± 14 | 0.17 | 46 ± 17 | <0.001 | 44 ± 14 | <0.001 |
| Male | 101 (73%) | 60 (71%) | 0.21 | 65 (41%) | <0.001 | 29 (55%) | 0.009 |
| White | 105 (80%) | 61 (73%) | 102 (65%) | 33 (62%) | |||
| Black | 3 (2%) | 3 (4%) | 6 (4%) | 2 (4%) | |||
| Asian | 14 (11%) | 12 (15%) | 20 (13%) | 11 (21%) | |||
| Latino | 6 (5%) | 4 (5%) | 16 (10%) | 3 (6%) | |||
| 0.73 | 0.098 | 0.007† | |||||
| Body mass index (kg/m2) | 28 ± 6 | 28 ± 6 | 0.92 | 27 ± 7 | 0.075 | 28 ± 17 | 0.69 |
| Hypertension | 49 (36%) | 34 (40%) | 0.51 | 32 (20%) | 0.003 | 4 (7%) | <0.001 |
| Type II diabetes | 10 (7%) | 13 (16%) | 0.056 | 10 (6%) | 0.73 | 3 (6%) | 0.64 |
| Coronary artery disease | 11 (8%) | 14 (17%) | 0.051 | 7 (4%) | 0.19 | 0 | 0.03 |
| Ejection Fraction (%)* | 58 ± 10 | 58 ± 11 | 0.99 | 62 ± 6 | 0.010 | -- | -- |
| History of congestive heart Failure | 9 (7%) | 8 (10%) | 0.43 | 0 | 0.001 | 0 | 0.051 |
P values are for comparisons to subjects with atrial fibrillation
*
Echocardiograms were available for 163 patients (66 with atrial fibrillation, 42 with atrial flutter, 55 with SVT, and none of the normal controls).
†
This difference was driven primarily by more white patients in the atrial fibrillation group SVT denotes supraventricular tachycardia
SVT denotes supraventricular tachycardia