Appendix E Advanced Feature Controls
E - 42 Instructions for Use
Dyssynchrony Analysis Window
Control Description
Time To Peak
Identifies the highest point on each curve for all parameters except strain longitudinal, strain
circumferential, strain rate longitudinal, and strain rate circumferential.
Identifies the lowest point on each curve for these parameters: strain longitudinal, strain
circumferential, strain rate longitudinal, and strain rate circumferential.
Time to 75%
Identifies the point that is 75% of the highest point on each curve for all parameters except
strain longitudinal, strain circumferential, strain rate longitudinal, and strain rate circumferential.
Identifies the point that is 75% of the lowest point on each curve for these parameters: strain
longitudinal, strain circumferential, strain rate longitudinal, and strain rate circumferential.
Time to 50%
Identifies the point that is 50% of the highest point on each curve for all parameters except
strain longitudinal, strain circumferential, strain rate longitudinal, and strain rate circumferential.
Identifies the point that is 50% of the lowest point on each curve for these parameters: strain
longitudinal, strain circumferential, strain rate longitudinal, and strain rate circumferential.
Reverse Peak
For all parameters except strain longitudinal, strain circumferential, strain rate longitudinal, and
strain rate circumferential, identifies the lowest point, the point that is 75% of the lowest point,
or the point that is 50% of the lowest point as determined by the "Time To" selection.
For parameters strain longitudinal, strain circumferential, strain rate longitudinal, and strain rate
circumferential, identifies the highest point, the point that is 75% of the highest point, or the
point that is 50% of the highest point as determined by the "Time To" selection.
R-R
Moves from beat to beat with each click in a continuous cycle. Disabled if only one beat is
captured.
Velocity Computes and displays values for the selected parameter:
 Longitudinal (longitudinal velocity). Long axis and generic curve views only.
 Rotation (rotation rate). Counterclockwise rotation is positive. Short axis views only.
 Radial (radial velocity).
Strain Computes and displays values for the selected parameter:
 Longitudinal (strain longitudinal). Long axis and generic curve views only.
 Circumferential (strain circumferential). Short axis views only.

Radial (radial strain). Requires endo/epi traces.
Strain Rate Computes and displays values for the selected parameter:
 Longitudinal (strain rate longitudinal). Long axis and generic curve views only.
 Circumferential (strain rate circumferential). Short axis views only.

(radial strain rate). Requires endo/epi traces.
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