ECG Components

An ECG is composed of a series of waves and lines usually ordered into some repeatable pattern. The waves and lines are displayed on either a two dimensional screen or on ECG paper. The height of the tracing represents millivolts while the width of the ECG addresses an interval of time.

The ability to interpret an ECG relies heavily on a good understanding of the basic ECG components.

An ECG is composed of a series of waves and lines usually ordered into some repeatable pattern. The waves and lines are displayed on either a two dimensional screen or on ECG paper. The height of the tracing represents millivolts while the width of the ECG addresses an interval of time.

This section on ECG components addresses each of the waves, intervals and segments of an ECG in the order that they would appear. While waves are fairly self-explanatory, intervals measure time from the start of one wave to the start of another wave (an interval includes at least one wave) and segments measure time between waves (waves are not included in a segment).

Figure 4.11 The Scales of the ECG

1. Six Second ECG Guidebook (2012), T Barill, p. 79-80

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Dynamic ECG rhythm interpretation
Static ECG rhythm interpretation
Clinical Impact Mapping
Acute Coronary Syndromes Overview
Acute Coronary Syndromes In-Depth
ST Segment & T Wave Differential
Identify Bundle Branch Blocks
15 | 18 Lead View Mapping
Electrical Axis
R Wave Progression
Left Bundle Branch Blocks with ACS
Atypical Findings
Acute Non-Ischemic Disease Conditions
Special Cases

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