Ortivus AB 410000409 User Manual

Appendix 10

is the area of difference between the reference complex and the

present complex.
QRS-VD is calculated by the formula:

ST-Change Vector magnitude (STC-VM)

The ST-vector does not only consist of a length; it also has a direction.

Changes of the ST-vector can concern the length as well as the

direction. With the parameter STC-VM these changes are measured

compared with the initial ST-vector, i.e. the ST-vector on the initial

averaged complex. With STC-VM both changes in the length and

direction of the ST-vector are measured. This means that if the patient

only has a change in the ST-direction but not in the magnitude this will

be seen in STC-VM but not in ST-VM.
More information regarding MIDA is available on Ortivus’ website:

www.ortivus.com

QRS VD

–

AX2 AY2 AZ2