Ventricular tachycardia (VT) occurs when the heart’s lower chambers, the ventricles, beat too rapidly and cannot pump enough blood around the body. SVT complicates approximately 1 in 1,000 pregnancies and may lead to hydrops or heart failure.ĭoctors may diagnose sinus tachycardia (ST) when a fetal heart rate is between 180 and 200 bpm.Ītrial tachycardia (AT) occurs when the heart’s upper chambers, the atria, beat too quickly. It occurs when the fetus’s heart rate is faster than 220 bpm. is taking sympathomimetic medications such as terbutalineįetal supraventricular tachycardia (SVT) is the most common type of fetal tachycardia.Tachyarrhythmiasįetal tachycardia refers to a heart rate faster than 180 bpm. However, doctors will monitor them closely as they may lead to proxysmal ventricular tachycardias (VTs). Another 0.5% will develop supraventricular tachycardia.įetal PVCs also usually resolve over time. While most PACs are harmless and usually resolve over time, approximately 1% of fetuses with PACs will have significant structural heart disease. ![]() This arrhythmia happens when the fetus has extra heartbeats, or ectopic beats, that originate in the atria (PACs) or the ventricles (PVCs). The most common type of fetal arrhythmia is premature contractions or PCs. ![]() They include: Extrasystoles or premature contractions (PCs) There are many types of fetal arrhythmias.
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