Table 2.

Mean and range for Z-scores of left ventricular dimensions and shortening fraction (SF) from cardiac ultrasounds in 13 infants <1 year of age with severe untreated MPS I

Parameter (number measured)	Mean value	Range of individual values
Mean Z-score LVID (13)	1.26 ± 0.86	0.45–3.37
Mean Z-score LVPWd (13)	0.97 ± 1.2	−1.11–2.61
Mean Z-score IVSd (13)	0.38 ± 1.05	−1.47–2.25
Mean Z-score Aortic Sinus (13)	1.55 ± 0.92	0.1–2.48
Mean SF (13)	35.1 ± 4.8	29–45