Electricity and Magnetism

The human heartbeat is, at its core, a precise sequence of electrical discharges. Before a single muscle fiber contracts or a drop of blood is pumped, the sinoatrial node fires a burst of electric charge that cascades through the myocardium. Understanding electricity and magnetism is not merely an abstract physics exercise; it is the study of the fundamental forces that animate the human body and power the life-saving technology modern medicine relies upon. From the sudden surge of a defibrillator discharging stored energy to the silent, invisible magnetic fields of an MRI machine reading the alignment of hydrogen atoms in soft tissue, electromagnetic forces dictate the modern clinical landscape. To master these concepts is to understand the literal pulse of patient care.