Supraventricular tachycardia can be a risk factor for events, depending upon the origin of the SVT and relative physical state of the individual experiencing it. But let's pause for a moment to consider whether the event you experienced constituted SVT or PAT (paroxsymal atrial tachycardia). PAT tends to be a bit more common in otherwise healthy individuals.

Indeed, benign palpitations are harmless to the heart and general physiology. They are a mere superimposition of electrical impulse to the heart. And without doubt, hormonal changes can indeed increase the potential for palpitations to occur, due to the influence of hormones upon the nervous system in general. Surges of epinephrine from the adrenal glands can be particularly disturbing in its ability to make the heart race, increase sweating, produce tremulousness and other symptoms.

In the presence of elevated heart rate without a known cause and in healthy persons, placing a cool compress over the eyes and pressing very gently for about 30 to 40 seconds will typically reverse the condition, a response known as the dive reflex.

You'll be fine.

Best regards and Good Health