What is a common symptom of Long QT Syndrome?

A common symptom of Long QT Syndrome is syncope, which refers to transient loss of consciousness or fainting. This occurs due to disturbances in the heart's electrical system that can lead to arrhythmias or episodes of rapid heartbeat, particularly during physical exertion or emotional stress. Syncope is a key presenting symptom because the heart's inability to maintain a normal rhythm can affect blood flow to the brain, resulting in these fainting episodes.

The other options, such as muscle weakness, memory loss, or cognitive decline, are not typically associated with Long QT Syndrome. Instead, they pertain to different medical conditions or neurological disorders. This highlights the importance of recognizing the specific signs and symptoms directly related to Long QT Syndrome for proper diagnosis and management.