SYNCOPE, VASOVAGAL

This study tests two ways to treat a slow heart rate caused by overactive nerves, without using a permanent pacemaker. One method uses freezing (cryoablation) and the other uses burning (radiofrequency) to calm the nerves. Sixty adults aged 18 to 60 with symptoms like fainting or…

This study looks at how a procedure called cardioneuroablation (CNA) affects exercise performance in people who faint due to a sudden slow heart rate. CNA stops certain nerves from slowing the heart too much, but it might also make the heart beat faster during exercise. Researche…

This study tests whether simple physical maneuvers like leg crossing, bending, or arm tensing can prevent fainting in children aged 6 to 18. Participants who visit the emergency department after a fainting episode will either receive standard care or learn these counterpressure m…

This study looks at whether simple leg movements, like crossing legs or tensing buttock muscles, can raise blood pressure in children aged 6-18 who faint often. Researchers will measure heart and blood flow responses during these movements in 30 children. The goal is to understan…

This study looks at a new procedure called cardioneuroablation for people with severe fainting spells. The procedure uses radio waves to target specific nerve clusters in the heart. The study will compare three methods to find these nerve clusters: electrical signals, CT scans, a…