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March 1959

Fundamentals of Electrocardiography and Vectorcardiography.

AMA Arch Intern Med. 1959;103(3):505. doi:10.1001/archinte.1959.00270030161017

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This book is intended to acquaint the beginner with fundamentals of the vector concept as well as electrocardiography and vectorcardiography. The ideas are presented in the usual fashion, but especially from the point of view of the author. There are some aspects of the vector concept, however, which are worthy of note since they do lead to some confusion, particularly for the beginner who may not have sufficient background to realize their significance. Some of these are presented to caution readers of the book.

Answers to the questions "What is a vector?" "What is a point of origin?" "What is an instantaneous vector?" "What is a resultant vector?" "What is a coordinate?" are poorly and vaguely presented. The statement, "There is no force at any point of the plane perpendicular to a vector" is not a correct statement. Apparently, the author wishes to state that if a vector is perpendicular

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