| M1. | Peak of the ECG QRS complex immediately preceding the selected IPG pulse, |
| M2. | Start of the systolic upslope of the IPG pulse, |
| M3. | Maximum amplitude of the IPG pulse, |
| M4. | Position of the dicrotic notch in the IPG pulse, |
| M5. | Maximum amplitude of the post-dicrotic segment of the IPG pulse, |
| M6. | Peak of the ECG QRS complex immediately after the systolic upslope of the selected IPG pulse, and |
| M7. | Start of the systolic upslope of the next IPG pulse. |