Table 5.

Prevalence of electrocardiographic abnormalities at the last available electrocardiogram, including both ERT treated and untreated subjects.

	Overall (n = 65)	MPS I (n = 20)	MPS II (n = 19)	MPS IV (n = 19)	MPS VI (n = 7)	p-value
Ventricular repolarization abnormalities	19/65 (29%)	4/20 (20%)	6/18 (33%)	8/19 (42%)	1/8 (13%)	0.311
Left atrial enlargement	5/65 (8%)	2/20 (10%)	2/18 (11%)	0/19 (0%)	1/8 (13%)	0.514
Right axis deviation	5/65 (8%)	2/20 (10%)	0/18 (0%)	1/19 (5%)	2/8 (25%)	0.159
Left ventricular overload	3/65 (5%)	1/20 (5%)	1/18 (5%)	1/19 (5%)	0/8 (0%)	0.930
Right ventricular overload	3/65 (5%)	0/20 (0%)	2/18 (11%)	1/19 (5%)	0/8 (0%)	0.377
Intraventricular block	3/65 (5%)	1/20 (5%)	0/18 (0%)	0/19 (0%)	2/8 (25%)	0.025*
Atrioventricular block	3/65 (5%)	2/20 (10%)	1/18 (5%)	0/19 (0%)	0/8 (0%)	0.447
Right atrial enlargement	2/65 (3%)	2/20 (10%)	0/18 (0%)	0/19 (0%)	0/8 (0%)	0.200
Prolonged QRS	1/65 (2%)	0/20 (0%)	1/18 (5%)	0/19 (0%)	0/8 (0%)	0.448

Statistical analysis with chi-squared.

^*p < 0.05.