A.34.5 Ambulatory Electrocardiogram Information Object Definition

A.34.5.1 Ambulatory ECG IOD Description

The Ambulatory 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 ambulatory electrocardiography (Holter) device.

Note: The duration of acquisition represented in one SOP Instance is not specifically constrained, and is limited only by the maximum size of the Waveform Data attribute.

A.34.5.2 Ambulatory ECG IOD Entity-Relationship Model

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

A.34.5.3 Ambulatory ECG IOD Module Table

Table A.34.5-1Ambulatory 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 U
Waveform Annotation C.10.10 C - required if annotation is present
SOP Common C.12.1 M

A.34.5.4 Ambulatory ECG IOD Content Constraints

A.34.5.4.1 Modality

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

A.34.5.4.2 Waveform Sequence

The number of Waveform Sequence (5400,0100) Items shall be be 1.

A.34.5.4.3 Number of Waveform Channels

The value of the Number of Waveform Channels (003A,0005) in the Waveform Sequence Item shall be between 1 and 12, inclusive.

A.34.5.4.5 Sampling Frequency

The value of the Sampling Frequency (003A,001A) in each Waveform Sequence Item shall be between 50 and 1000, inclusive.

A.34.5.4.6 Channel Source

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

A.34.5.4.7 Waveform Sample Interpretation

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