Table 1: Normal vs. abnormal QT interval discrimination according to QTc (ms) scales proposed by the FDA for non-athletes and Seattle Criteria for athletes.

Proposed by	QTc (ms)	Male	Female
FDA (for non-athletes)	Long QT	>450	>460
	Possible Long QT	431-450	451-460
	Normal	390-430	390-450
	Short QT	<390	<390
Seattle Criteria (for athletes)	Long QT	>499	>499
	Possible Long QT	470-499	480-499
	Normal	321-469	321-479
	Short QT	<321	<321