What does SVT indicate in terms of heart rhythm?

Supraventricular tachycardia (SVT) refers to a rapid heart rhythm that originates above the ventricles in the atria or atrioventricular (AV) junction. This condition is characterized by an abnormal increase in heart rate, which can be caused by various mechanisms, such as re-entry circuits or increased automaticity. SVT typically presents with symptoms like palpitations, dizziness, or even fainting due to the heart beating too quickly to effectively pump blood.

Understanding SVT is crucial for medical professionals as it can lead to more serious complications if left untreated. The recognition of SVT can inform treatment strategies, which may include vagal maneuvers, medications, or other interventions to restore a normal heart rhythm.

The other choices do not correspond to any recognized medical terminology or concepts related to heart rhythm and, therefore, do not provide accurate information regarding the nature and significance of SVT.