The Normal Electrocardiogram

  • Massimo Romanò
Chapter

Abstract

The electrocardiograph is a galvanometer calibrated to produce a deflection with an amplitude of 1 cm for every millivolt (mV) of voltage. The electrocardiogram (ECG) is recorded on graph paper divided into small 1-mm squares. At the standard paper speed of 25 mm/s, each small square corresponds to 40 ms (Fig. 3.1). Before the ECG is recorded, the machine must be calibrated to ensure that it is functioning correctly, and the square (or rectangular) calibration mark must be recorded on the tracing.

Keywords

Frontal Plane Negative Deflection Precordial Lead Positive Deflection Early Repolarization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Milan 2015

Authors and Affiliations

  • Massimo Romanò
    • 1
  1. 1.Ospedale Civile di VigevanoVigevanoItaly

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