Diagnosing long QT syndrome

Ifyour GPthinks you havelong QT syndrome after assessing your symptoms, they may recommend that you have an ECG and refer you to a heart specialist (cardiologist).

In particular, if blackouts have occurred during exercise, or if there's a family history of sudden cardiac death below the age of 40, specialist assessment is needed.

AnECG is a test that records your heart's rhythm and electrical activity. If you have long QT syndrome, the trace of the QT section will be longer than normal.

During an ECG, sticky pads called electrodes arestuck on your arms, legs and chest, and connectedby wires to an ECG machine. The test may need to be carried out while you exercise on a treadmill, as well as during rest.

Genetic testing may be needed to identify the defective gene that may be causing long QT syndrome. It can also help to determine which family members may have inherited the defective gene and need clinical assessment.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dez 2018