The prevalence and diagnostic/prognostic utility of sinus arrhythmia in the evaluation of congenital long QT syndrome

摘要

BACKGROUNDCongenital long QT syndrome (LQTS) affects 1 in 2,500 people and can cause syncope and sudden death. Sinus arrhythmia (SA) is nonpathologic baseline respiratory variation of the RR interval.