Medical student about Kindle: those once 40-lb volumes are now in the pocket of my white coat

A medical student emailed the Kindle team: "What you have here is a great product. I am a third year medical student out of New York, and have loaded a bunch of my textbooks onto the Kindle. Those once 40lb volumes of ill-fated tree trunks, are less than a pound, and now in the pocket of my white coat. Really a great asset!"

A former law student commented: "If I had a Kindle in law school, I think I would be 2 inches taller, and not need glasses..."

White board video session: Cleveland Clinic cardiologist explains arrhythmias

An arrhythmia is a disorder of the heart rate (pulse) or heart rhythm, such as beating too fast (tachycardia), too slow (bradycardia), or irregularly. In these white board sessions, cardiologist and electrophysiologist Patrick J. Tchou, MD, describes different types of arrhythmias: