3. The Electrical Heart:It is essential to know and understand the electrical system of the heart! Without this, you won't understand how the whole system works.
B.4. The Contracting Heart:Once you know how the heart works electrically, it is not too difficult to understand how the heart contracts and how it pumps the blood through the whole body.
B.7. CVS Pathophysiology:Unfortunately, both in heart and in the blood vessels, things can go wrong. Here is a short summary of some major diseases of the CVS.