Left Ventricular Pressure (LVP) Analysis

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AcqKnowledge^® extracts various cycle-by-cycle cardiac measures of left ventricular blood pressure data, optionally in conjunction with an ECG Lead II signal. Define events at the systolic pressure and the left ventricular end diastolic pressure (LVEDP) for each cycle; examine the LVP signal and its derivative. Selected preferred location method—Adaptive threshold of 0 plus a percentage of the peak to peak change in pressure OR First zero crossings before contraction. Examines the LVP signal, ECG, and derivative of the LVP signal.

• If the LVP and ECG signals have not been classified before this analysis is executed, they will be classified automatically.
• Derivatives of the LVP signal can be pre-existing or can be constructed automatically.

The analysis outputs the following information on a cycle-by-cycle basis and the textual output cites the average of all of these cycle-by-cycle measurements:

Name	Abbrev.
Contractility index	CI
Developed pressure	DP
dP/dt Max	–
dP/dt Min	–
End diastolic pressure	LVEDP
Minimum pressure	Min
QA Interval	QA
Rate	–
Recovery time	%REC
Systolic pressure	SYS
TAU
Tension time index	TTI

Application Notes

Knowledge Base