Atypical fetal junctional ectopic tachycardia: a case report and literature review

Table 1 Comparison of the clinical course of the reported cases of fetal junctional ectopic tachycardia

	Patients
	1	2	3	4	5	6	7	8	9
Age (years)	32	23	27	34					25
GA at examination (weeks)	32	20	31	19	28	34	23	32	32
FHR (bpm)	130	180	190	200	280	270	180	200	170
1:1 AV conduction		+	+	+	+	+		+	+
AV dissociation	+		–	+			+	+
Minimal variability	+	+
DV and PV retrograde flow	+	+	+						+
Fetal hydrops	–	+	+	+	+		+	+	+
Other findings	UV pulsation TR MR	Ventricular filling: monophasic	Ventricular filling: monophasic						UV pulsation
	Ventricular filling: biphasic–monophasic								Dilated RA
	Fetal ascites	fMCG: AV dissociation							TR
									FO abnormally displaced toward the right
Fetal diagnosis	PRFO	JET	JET or VT	JET	JET	JET	JET	JET	JET
Fetal therapy
Digoxin	–	+ (non-effective)	+ (effective)	+ (non-effective)	+			+ (non-effective)
Sotalol	–	+ (non-effective)		+ (non-effective)	+			+ (non-effective)
Amiodarone	–	+ (effective)					+ (effective)		+ (effective)
Flecainide			+ (effective)
GA at delivery	32	38	37	36	39			36	34
ECG
HR	150–250	150–170	343						160
1:1 AV conduction			+						+
AV dissociation	+		+						+
Neonatal therapy
Amiodarone	+ (stopped because of side effect)	–		+ (effective)				+ (effective)	+ (effective)
Flecainide	+ (effective)		+ (effective)
Propranolol		+ (effective)	+ (effective)
Prognosis	JET under control	Sinus rhythm	JET under control	Sinus rhythm	Stop postnatally	Stop prenatally		Sinus rhythm	JET under control

AV atrioventricular, DV ductus vein, ECG electrocardiogram, FHR fetal heart rate, fMCG fetal magnetocardiography, FO foramen ovale, GA gestational age, JET junctional ectopic tachycardia, MR mitral regurgitation, PRFO premature restriction of foramen ovale, PV pulmonary vein, RA right atrium, TR tricuspid regurgitation, UV umbilical vein, VT ventricular tachycardia; + = present, − = absent, blank = not described
Patient no. (reference): 1, our report; 2, Zaidi et al. [7]; 3, Zaidi et al. [7]; 4, Fouron [10]; 5, Fouron [10]; 6, Fouron [10]; 7, Strasburger et al. [11]; 8, Fouron et al. [9]; 9, Lupoglazoff et al. [8]

ISSN: 1471-2393