FE FE Arrhythmias & Cardiac Function

Question 1

Which is the most common fetal cardiac arrhythmia encountered in clinical practice?

Accepted Answer

Premature atrial contractions (PACs)

Answer

Supraventricular tachycardia

Answer

Complete heart block

Answer

Ventricular tachycardia

Question 2

Most premature atrial contractions (PACs) in the fetus are:

Accepted Answer

Conducted to the ventricles

Answer

Blocked and not conducted

Answer

Associated with structural heart disease

Answer

Indicative of complete heart block

Question 3

Fetal supraventricular tachycardia (SVT) is defined by a ventricular rate of:

Accepted Answer

Greater than 200 bpm

Answer

160–180 bpm

Answer

180–200 bpm

Answer

Greater than 220 bpm

Question 4

Which M-mode echocardiographic finding is most useful for diagnosing fetal tachyarrhythmias?

Accepted Answer

Simultaneous recording of atrial and ventricular wall motion to assess AV relationship

Answer

Measuring chamber dimensions

Answer

Measuring aortic root diameter

Answer

Assessing pericardial effusion

Question 5

Untreated sustained fetal SVT is most likely to lead to which complication?

Accepted Answer

Non-immune hydrops fetalis

Answer

Premature delivery

Answer

Placental abruption

Answer

Oligohydramnios

Question 6

Which antiarrhythmic drug is most commonly used as first-line transplacental therapy for fetal SVT?

Accepted Answer

Digoxin

Answer

Amiodarone

Answer

Flecainide

Answer

Sotalol