Replagal Enzyme Replacement Therapy for Children With Fabry Disease

Primary Objective(s): * To assess the safety of Replagal at a dose of 0.2 mg/kg administered over 40 (+/-10) minutes in children with Fabry disease * To assess the effect of Replagal on heart rate variability in patients 7 to 17 years of age Secondary Objective(s): * To determine the pharmacokinetics of Replagal at baseline and after the initiation of enzyme replacement therapy (ERT) * To determine exploratory measurements of efficacy including renal function (ie, estimated glomerular filtration rate \[eGFR\] and creatinine clearance), clinical outcomes (in Cohorts 1 and 2), and sweating and left ventricular mass index (LVMI) (Cohort 1, Phase 1 only)