The PR interval is the time from the beginning of the P wave (atrial depolarization) to the beginning of the QRS complex (ventricular depolarization). The normal PR interval measures 0.12-0.20 seconds ...

To the Editor: We read with interest the article titled “Cardiovascular Abnormalities in Late Onset Pompe Disease and ERT” by Forsha et al. 1. Ninety patients were randomized 2:1 to enzyme replacement ...

Fabry's disease is a rare, X-linked disorder characterized by subnormal or absent activity of the lysosomal hydrolase α-galactosidase A. A deficiency of α-galactosidase A leads to progressive ...