This clinical trial is focused on studying a condition known as Paroxysmal Supraventricular Tachycardia (PSVT), which is a type of rapid heart rate that starts and stops suddenly. The treatment being tested is a medication called Etripamil, which is administered as a nasal spray. The purpose of the study is to evaluate how effective a single dose of this nasal spray is in stopping an episode of PSVT in children.
The study is divided into two parts based on age groups: one for patients aged 12 to under 18 years, and another for those aged 6 to under 12 years. During the study, participants will receive the Etripamil nasal spray to see if it can successfully convert the rapid heart rate back to a normal rhythm. The nasal spray is designed to deliver the medication directly through the nose using a special device that ensures the correct amount is administered.
Participants will be monitored to see how quickly the treatment works and whether any additional medical help is needed. The study will also look at how well the nasal spray is tolerated, including any side effects at the site where it is administered, and any changes in vital signs like heart rate and blood pressure after using the spray. The goal is to determine the safety and effectiveness of Etripamil nasal spray for treating PSVT in children.



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