Current Medical Diagnosis and Treatment 2007 (Current Medical Diagnosis and Treatment)
Stephen J. McPhee, Maxine A. Papadakis, Lawrence M. Tierney
page 390:
5. Long QT Syndrome
Because this is a primary electrical disorder, usually with no evidence of structural heart disease or LV dysfunction, the long-term prognosis is excellent if arrhytmia is controlled. Long-term treatment with beta-blockers, permanent pacing, or left cervicothoracic sympathectomy is frequently effective.