| Name | Type | Nullable | Default value | Comment |
|---|
| CASE_ID | VARCHAR2(6) | N | | The MIMIC-II Case ID (in the waveform database) of the record. |
| RECORD_NAME | VARCHAR2(8) | N | | The name of the WFDB record (within the directory named by the Case ID). |
| SIGNAL_NUM | NUMBER(3) | N | | The index of the signal within the record. |
| FILE_NAME | VARCHAR2(500) | Y | | Currently unused. |
| STORAGE_FORMAT | NUMBER(2) | Y | | Currently unused. |
| SAMPLES_PER_FRAME | NUMBER(2) | Y | | Currently unused. |
| SKEW | NUMBER(6) | Y | | Currently unused. |
| BYTE_OFFSET | NUMBER(6) | Y | | Currently unused. |
| ADC_GAIN | NUMBER(38) | Y | | The amplification, prior to digitization, of the signal. |
| BASELINE | NUMBER(38) | Y | | The sample value corresponding to a baseline level for the signal. |
| UNITS | VARCHAR2(10) | Y | | The physical dimensions of the values in the signal. |
| ADC_RESOLUTION | NUMBER(3) | Y | | The resolution of the A/D conversion of the signal in number of bits. |
| ADC_ZERO | NUMBER(5) | Y | | The value produced by the A/D conversion given a 0-volt input for the signal. |
| INITIAL_VALUE | NUMBER(10) | Y | | The first sample value of the signal, in non-physical units (i.e. as an integer-encoded number). |
| CHECKSUM | NUMBER(6) | Y | | The checksum for the signal. |
| BLOCK_SIZE | NUMBER(5) | Y | | Currently unused. |
| DESCRIPTION | VARCHAR2(4000) | Y | | A short description of the type of the signal. |
| SUBJECT_ID | NUMBER(7) | Y | | The MIMIC-II Subject ID (in the clinical database) of the patient from whom the record was recorded. |
