Table 3.
Clinical manifestation and characteristics of dynamic electrocardiograms between the groups (n (%)).
| Factor (n = 532) | Long R-R interval group (n = 399) | Nonlong R-R interval group (n = 133) | χ 2 | P |
|---|---|---|---|---|
| Dizziness/syncope (n = 489) | 372 (93.23%) | 117 (87.97%) | 3.045 | 0.081 |
| Combination with cerebral infarction (n = 124) | 94 (23.56%) | 30 (22.56%) | 0.014 | 0.906 |
| ST-segment alteration (n = 348) | 268 (67.17%) | 80 (60.15%) | 1.872 | 0.171 |
| Combination with ventricular premature beats (n = 452) | 335 (83.86%) | 117 (87.97%) | 0.961 | 0.327 |
| Combination with atrial premature beats (n = 112) | 96 (24.06%) | 16 (12.03%) | 7.977 | 0.005 |