Predictors of adverse cardiac events in pregnant women with PVCs*
| Characteristic | Adverse cardiac event, n=6 | No adverse cardiac events, n=47 | OR (95% CI) | P value |
| Univariate analysis | ||||
| Age, years | 30±7 | 33±4 | 0.89 (0.76 to 1.1) | 0.20 |
| LVEF, % | 59±4 | 59±5 | 0.95 (0.82 to 1.2) | 0.63 |
| Maximal PVC burden in pregnancy, % | 18±20 | 14±12 | 1.0 (0.96 to 1.1) | 0.58 |
| PVCs prepregnancy | 2 (33%) | 16 (34%) | 0.22 (0.02 to 2.1) | 0.97 |
| Nulliparity | 2 (33%) | 13 (28%) | 1.3 (0.21 to 8.0) | 0.77 |
| Obstetric risk factors† | 3 (50%) | 22 (47%) | 1.13 (0.21 to 6.2) | 0.88 |
*Data reported as mean ±SD or n (%).
†Obstetric risk factors include smoking, anticoagulation use, multiple gestation and maternal age <20 and >35 years; prior history of premature delivery or rupture of membranes, incompetent cervix, caesarean delivery; and during the present pregnancy, intrauterine growth restriction, antepartum bleeding >12 weeks gestation, febrile illness, uterine/placental abnormalities.
LVEF, left ventricular ejection fraction; PVC, premature ventricular contraction.