Table 3.

ECG findings in SBMA patients and controls

ECG finding	SBMA patients		Controls
Heart rate (bpm), mean ± std	72 ± 13		72 ± 15
Atrial fibrillation, n	2/30		0/11
Left anterior hemiblock, n	3/30		0/11
Right bundle branch block, n	3/30		0/11
Brugada ECG pattern, n	2/30		0/11
Early repolarization pattern, n	17/30	Notching = 7	2/11	Notching = 1
		Slurring = 4		Slurring = 0
		Notching and slurring = 6		Notching and slurring = 1
Fragmented QRS complex, n	5/30		0/11
QTc, ms	413 ± 24		418 ± 24
Prolonged QTc, n (%)	2/30 (7)		0/11
Pathological repolarization (Brugada or early repolarization or fQRS), n (%)	20/30 (67)		2/11 (18)
Any pathological ECG, n (%)	21/30 (70)		2/11 (18)