TABLE 1.
Baseline characteristics. Comparison between the two groups with idiopathic PVCs and with structural heart disease
| Overall sample (n = 312) | Idiopathic PVCs (n = 177) | Structural heart disease (n = 135) | p‐value | |
|---|---|---|---|---|
| Demographic data | ||||
| Age in years, median (Q1–Q3) | 69 (61–77) | 68 (60–77) | 70 (62–76) | .226 |
| Male gender, n (%) | 186 (60) | 85 (48) | 101 (75) | <.0001 |
| Risk factors | ||||
| Diabetes, n (%) | 64 (26) | 28 (20) | 36 (36) | .003 |
| Hypertension, n (%) | 212 (86) | 121 (82) | 91 (91) | .045 |
| Medications | ||||
| Beta‐blockers, n (%) | 104 (37) | 41 (25) | 63 (55) | <.0001 |
| Echocardiogram | ||||
| LAD in mm, median (Q1–Q3) | 40 (35–45) | 36 (34–42) | 42 (37–47) | <.0001 |
| LVEDD in mm, median (Q1–Q3) | 53 (49–59) | 50 (48–54) | 58 (53–64) | <.0001 |
| LVESD, in mm, median (Q1–Q3) | 35 (30–40) | 31 (29–35) | 42 (35–50) | <.0001 |
| LVFS (%), median (Q1–Q3) | 36 (28–40) | 39 (35–41) | 27 (20–36) | <.0001 |
| 24‐hr Holter recording | ||||
| Nº of PVCs/24 hr, median (Q1–Q3) | 2,894 (1,594–7,025) | 2,833 (1,619–7,192) | 3,050 (1,504–6,894) | .634 |
| PVC percentage, median (Q1–Q3) | 2.7 (1.6–6.7) | 2.7 (1.7–6.8) | 2.8 (1.6–6.6) | .997 |
| Polymorphic morphology, n (%) | 211 (70%) | 112 (65) | 99 (77) | .022 |
| Couplets, n (%) | 236 (75) | 118 (67) | 118 (87) | <.0001 |
| Triplets, n (%) | 106 (34) | 47 (27) | 59 (44) | .002 |
| NSVT, n (%) | 62 (20) | 22 (12) | 40 (30) | <.0001 |
| SV runs, n (%) | 108 (35) | 70 (40) | 38 (28) | .041 |
| Episodes of AF, n (%) | 3 (1) | 2 (1.1) | 1 (0.7) | 1.000 |
Abbreviations: AF, atrial fibrillation; LA, left atrium; LVEDD, left ventricular end diastolic diameter; LVESD, left ventricular end systolic diameter; LVFS, left ventricular fractional shortening; NSVT, non‐sustained ventricular tachycardia; PVCs, premature ventricular contractions; SV, supraventricular.