Summary of patient characteristics with short and long VA interval
| Case | VA/AV ratio | GA at detection | Max HR (beats/min) | Pattern of SVT | Sign of CHF | Treatment in utero | GA at birth | Treatment postnatal | SVT postnatal | ECG |
|---|---|---|---|---|---|---|---|---|---|---|
| Short VA SVT | ||||||||||
| 1 | 0.55 | 26 | 240 | Sustained | H | D(−), S(+) | 40 | S(+) | Yes/reentry | WPW |
| 2 | 0.52 | 35 | 200 | Sustained | No | D(−); V(−), delivery | 37 | Propr(+) | No | WPW |
| 3 | 0.34 | 31 | 288 | Intermittent | No | D(+) | 40 | No | No | Normal |
| 4 | 0.22 | 30 | 214 | Intermittent | No | D(−); S(+) | 40 | No | No | Normal |
| 5 | 0.33 | 31 | 187 | Intermittent | No | D(+) | 41 | D(+) | No | Normal |
| 6 | 0.3 | 25 | 192 | Sustained | No | D(+) | 40 | D(−), S(+) | Yes/reentry | Normal |
| 7 | 0.44 | 34 | 200 | Intermittent | No | No | 40 | No | No | Normal |
| 8 | 0.22 | 31 | 219 | Intermittent | PE | D(+) | 40 | D(+) | No | Normal |
| 9 | 0.49 | 20 | 218 | Intermittent | No | D(−) | 40 | D(+) | No | Normal |
| 101-150 | 0.32 | 32 | 229 | Intermittent | No | No | 33 | No | No | Normal |
| 11 | 0.15 | 38 | 222 | Intermittent | No | No | 40 | No | No | Normal |
| 12 | 0.63 | 38 | 230 | Sustained | No | No | 38 | D(+) | No | WPW |
| 131-150 | 0.44 | 25 | 230 | Intermittent | No | D(+) | 38 | No | No | Normal |
| 14 | 0.07 | 36 | 272 | Sustained | No | D(+) | 39 | D(+) | No | Normal |
| 15† | 0.35 | 30 | 214 | Intermittent | No | D(+) | 39 | No | No | RVH |
| 16 | 0.33 | 32 | 250 | Intermittent | No | D(+) | 38 | D(+) | No | Normal |
| 17 | 0.55 | 28 | 260 | Intermittent | H,CMP | D(+), delivery | 32 | D(+) | No | Normal |
| 18 | 0.05 | 26 | 232 | Intermittent | No | No | 39 | No | No | Normal |
| 19 | 0.16 | 32 | 285 | Sustained | H | D(−), S(+), delivery | 35 | S(+) | Yes/reentry | WPW |
| Mean (SD) | 0.34 (0.16) | 30.5 (4.7) | 230.6 (29) | 3/19 | (+) = 17/19 | 38.4 (2.5) | 3/14 | |||
| Long VA SVT | ||||||||||
| 20 | 3.13 | 24 | 234 | Sustained | H,CMP | D(−), Ad(−), S(+) | Death iu | — | ||
| 21 | 3.33 | 27 | 235 | Sustained | No | D(−), S(−), delivery | 36 | D(−), S(−), Flec(−), Pf(+) | Yes/PJRT | Normal |
| 22 | 4.23 | 29 | 220 | Sustained | No | D(−), S(+) | 40 | D(−), S(+) | Yes/PJRT | Normal |
| 23 | 4.89 | 34 | 216 | Sustained | CMP | D(−), delivery | 35 | D(−), Ad(−), EC(−), Am(+), Pf(+) | Yes/AET | Normal |
| Mean (SD) | 3.89 (0.82) | 28.5 (4.2) | 226 (9.7) | 2/4 | (+) = 2/4 | 37 (2.6) | 3/3 |
Drug effects: (–), no rhythm control; (+), rhythm control.
↵1-150 Twin pregnancy; †tetralogy of Fallot.
CHF, congestive heart failure; CMP, cardiomyopathy; GA, gestational age in weeks; H, hydrops; HR, maximum heart rate before treatment; iu, in utero; PE, pericardial effusion, RVH, right ventricular hypertrophy; SVT, supraventricular tachycardia; WPW, Wolff-Parkinson-White syndrome; PJRT, permanent form of junctional reciprocating tachycardia; AET, atrial ectopic tachycardia.
Ad, adenosine; Am, amiodarone; D, digoxin; EC, electroconversion; Flec, flecainide; Pf, propafenone; Propr, propranolol; S, sotalol; V, verapamil.