THE HEART - so vital to our existance, so profound, so...hard to remember all the boatloads of information related to the heart! Well, thank goodness for tutorials such as the ones created by Blaufuss Multimedia Laboratories.
Their Heart Sounds and Cardiac Arrythmias tutorials walks you through all you need to know about heart sounds and electrocardiogram / arrhythmias. There are pictures, animated images, sound, and you can even take a quiz to test your knowledge.
Bless their hearts for creating such an awesome resource!