It is not apparent for whom this text is intended. Its greatest achievement is to spell out the meaning of medicine's premier alphabet soup: “NSSTTWΔs.” The ABC title, large print, nicely done schematic figures, and handy teaching method providing immediate feedback suggest that it would be pertinent for intensive care unit nurses and paramedics. Yet sophisticated knowledge of concepts such as vectorcardiography are presumed and, in fact, relied on.
The medical student also obviously is not the intended reader. Advanced concepts are mentioned and not explained, and continual use of some such terms makes the importance of understanding them inescapable