What should you do about SVT during pregnancy?

What does the evidence show for supraventricular tachycardia?

• SVT arises from electrical activity above the heart’s lower chambers and may start and stop abruptly. People can notice palpitations, dizziness, chest discomfort or breathlessness. Similar sensations can have other causes, so symptoms alone do not identify the electrical pattern. 1
• An electrocardiogram records the heart’s electrical activity. A short recording may miss an episode that has already ended, so the clinician may recommend a portable monitor. Note the timing and associated symptoms to help interpret what the recording shows. 2
• Pregnancy assessment also considers anemia, thyroid function, electrolytes and underlying heart disease when indicated. A modest pregnancy-related increase in pulse is different from establishing SVT. A wearable pulse alert is useful history but does not replace evaluation of the rhythm. 3
• Acute care depends on how well circulation is maintained and the rhythm identified. Clinicians can use pregnancy-appropriate measures, medicines or electrical cardioversion when required. Learn any recommended maneuver directly from your team rather than trying a neck massage or an internet protocol. 3
• A fast heartbeat with chest pain, faintness or difficulty breathing is an urgent maternal warning sign. Do not wait to see whether a monitor app can label it. Tell emergency staff that you are pregnant and describe any previous documented rhythm episodes. 4

When should I call my provider about supraventricular tachycardia?

Call emergency services for a racing heart with chest pain, fainting, severe shortness of breath or collapse. Seek prompt assessment of a new persistent or recurrent episode. Follow a clinician-taught plan only when it is appropriate to your known rhythm and symptoms.