There are three main categories of fetal arrhythmias: (1) an irregular rhythm with a normal fetal heart rate (FHR), as a consequence to premature beats or to conduction anomalies; (2) tachyarrhythmias (defined as FHR > 180 beats per minute-bpm), and (3) bradyarrhythmias (defined as FHR < 110 bpm) [1,2,3,4,5].

Fetal supraventricular tachycardia (SVT) is the most common form of fetal tachycardia. If started early in pregnancy, it can cause non-immune fetal hydrops. Echocardiography is the preferred method for the diagnosis with simultaneous pulsed Doppler recording from the superior vena cava and ascending aorta.

2024年2月5日 · Fetal tachycardia is defined as a fetal heart rate >180 bpm. If the heart rate is >180 bpm with a 1:1 atrioventricular ratio, SVT is the probable diagnosis.

Supraventricular tachycardia is the most common type of fetal tachycardia. SVT occurs when the heart’s upper chambers (atria) and lower chambers (ventricles) beat faster than 200 BPM. Atrial flutter occurs when the heart’s top chambers (atria) beat much faster than its …

If obstetric examination (eg, auscultation of the FHR, cardiotocography, standard ultrasound examination) raises concern for a pathologic arrhythmia, then referral to a fetal cardiologist or other expert in fetal cardiac disorders is recommended for a comprehensive evaluation of cardiac structure and function.

2017年12月15日 · There is no consensus on the most effective and best tolerated first‐line antiarrhythmic treatment for fetal tachyarrhythmia. The purpose of this systematic review and meta‐analysis was to compare the efficacy, safety, and fetal–maternal tolerance of first‐line monotherapies for fetal supraventricular tachycardia and atrial flutter.

The normal fetal heart rate ranges between 110 and 160 beats per minute. A fetal heart rate is considered abnormal if the heart rate is beyond ... This article reviews important features for improving the diagnosis and management of fetal arrhythmias.

2022年9月15日 · The vast majority of fetal SVT is reentrant SVT. In this case, the fetal heart rate (FHR) is usually 220 to 320/min and regular, with a 1:1 relationship of atrium and ventricle. SVT is usually initiated by PACs. 32 The average time to conversion/control is 6 to 7 days.

Supraventricular Tachycardia (SVT): SVT is characterized by an abnormally fast heart rate. This may originate in the atria or can be due to an abnormal electrical circuit between the upper chambers (atria) and lower chambers (ventricle). It can cause a rapid and sustained increase in the fetal heart rate often at rates well above 200 bpm.

2025年4月1日 · At 20 weeks’ gestation, an obstetrician performs a routine fetal ultrasonogram that shows normal intracardiac anatomy and function but raises concerns about an abnormal fetal heart rhythm. The rest of the fetal ultrasonogram survey reveals no abnormalities, with no signs of pericardial effusion, pleural effusion, ascites, or skin edema, and a normal quantity of amniotic fluid. At 22 weeks ...