A.34.4 General Electrocardiogram Information Object Definition

A.34.4.1 General ECG IOD Description

The General Electrocardiogram (ECG) IOD is the specification of digitized electrical signals from the patient cardiac conduction system collected on the body surface, which has been acquired by an ECG modality or by an ECG acquisition function within an imaging modality.

A.34.4.2 General ECG IOD Entity-Relationship Model

The E-R Model in Section A.34.1 of this Part applies to the General ECG IOD.

A.34.4.3 General ECG IOD Module Table

Table A.34.4-1General ECG IOD Modules

IE Module Reference Usage
Patient Patient C.7.1.1 M
Clinical Trial Subject C.7.1.3 U
Study General Study C.7.2.1 M
Patient Study C.7.2.2 U
Clinical Trial Study C.7.2.3 U
Series General Series C.7.3.1 M
Clinical Trial Series C.7.3.2 U
Frame of Reference Synchronization C.7.4.2 U
Equipment General Equipment C.7.5.1 M
Waveform Waveform Identification C.10.8 M
Waveform C.10.9 M
Acquisition Context C.7.6.14 M
Waveform Annotation C.10.10 C - required if annotation is present
SOP Common C.12.1 M

A.34.4.4 General ECG IOD Content Constraints

A.34.4.4.1 Modality

The value of Modality (0008,0060) shall be ECG.

A.34.4.4.2 Waveform Sequence

The number of Waveform Sequence (5400,0100) Items shall be between 1 and 4, inclusive.

A.34.4.4.3 Number of Waveform Channels

The value of the Number of Waveform Channels (003A,0005) in each Waveform Sequence Item shall be between 1 and 24, inclusive.

A.34.4.4.4 Sampling Frequency

The value of the Sampling Frequency (003A,001A) in each Waveform Sequence Item shall be between 200 and 1000, inclusive.

A.34.4.4.5 Channel Source

The Defined Context ID for the Channel Source Sequence (003A,0208) in each Channel Definition Sequence Item shall be CID 3001.

Note: Terms from other Context Groups may also be used for extended specification of the Channel Source, as declared in the Conformance Statement for an application (see PS3.2).

A.34.4.4.6 Waveform Sample Interpretation

The value of the Waveform Sample Interpretation (5400,1006) in each Waveform Sequence Item shall be SS.

A.34.4.4.7 Waveform Annotation Module

The Defined Context ID for the Concept Name Code Sequence (0040,A043) in the Waveform Annotation Sequence (0040,B020) shall be CID 3335. This Context Group supports the annotation of suppressed pacemaker spikes in the ECG waveform.