DynaPulse Wave Screening Terms and Definitions

Systolic Blood Pressure 

Systolic blood pressure is the measurement of standard clinical systolic blood pressure. Measured using standard oscillometric algorithms, and closely represents values taken by auscultatory techniques using mercury cuff sphygmomanometry and Korotkoff sounds (K1).

Diastolic Blood Pressure 

Diastolic blood pressure is the measurement of standard clinical diastolic blood pressure. Measured using standard oscillometric algorithms, and closely represents values taken by auscultatory techniques using mercury cuff sphygmomanometry and Korotkoff sounds (K4).

Central End-Systolic 

End systolic blood pressure measures central arterial blood pressure at end-systole. Measured using proprietary Pulse Dynamics waveform pattern-recognition algorithms.

Central End-Diastolic 

End diastolic blood pressure measures central arterial blood pressure at end-diastole. Measured using proprietary Pulse Dynamics waveform pattern-recognition algorithms.

Mean Arterial Pressure 

Mean arterial pressure is the average blood pressure over time, measured using proprietary Pulse Dynamics pattern-recognition algorithms. It can also be estimated using MAP = 1/3 Systolic + 2/3 Diastolic.

Pulse Pressure 

Pulse Pressure is systolic - diastolic blood pressure.

Heart Rate 

Heart rate is the number of heart beats per minute.

LVEjection Time 

LV Ejection Time is the duration of the systolic cycle

LVdP/dt Max 

This is an index that is used clinically to characterize the contractile ability of the heart. It is believed that maximum dP/dt is a reasonable index of the initial velocity of myocardial contraction. The maximum left ventricular dP/dt, which is normally about 1600 mm Hg/sec, tends to be less than 1200 mm Hg/sec in patients with disorders of the left ventricular myocardium.

LVContractility  

LV Contractility is an index of cardiac contractility. It is defined as LV dP/dt max/Pmax

Cardiac Output 

Cardiac output is one of the most basic measurements of cardiovascular function. It is usually defined as the volume of blood ejected per minute by either ventricle, and since the two ventricles are usually in balance, the two outputs are essentially equal. Cardiac Output (CO) is calculated as: CO = SV X HR [L/min]

Cardiac Index 

Cardiac Index = CO / BSA, where BSA is body surface area

Stroke Volume 

Stroke Volume (SV) = CO / HR

Stroke Volume Index 

Stroke Volume Index = SV / BSA, where BSA is body surface area.

SV Compliance 

The compliance is a relatively new cardiovascular parameter that was developed to assess the elasticity or rigidity of the heart and arteries. The compliance is calculated as Change in Volume/Change in Pressure In order to assess the systemic compliance, which is the compliance of the heart and large arteries, the change in volume of the heart (stroke volume) is divided by the change in pressure within the heart (systolic pressure minus the diastolic pressure): SVC = SV/(SBP-DBP) x [ml/mmHg]

SV Resistance 

The systemic vascular resistance is the effect of the vessels resisting flow. This resistance is primarily a function of vessel size and of the number of vessels open. It can be calculated by: SVR = MAP/CO [mmHg/(L/min)]

BA Compliance 

Brachial Artery Compliance is defined as dV/dP, derived using a physical model of the brachial artery segment

BA Distensibility 

Brachial Artery Distensibility is defined as the compliance divided by the arterial volume [(dV/dP)/V], or the percentage change in volume per mmHg change in pressure

BA Resistance 

Brachial Artery Resistance = (MAP-DBP)/(Diastolic volume flow)

Body Mass Index 

BMI = Weight/(Height * Height) * 10000 (kg/(cm*cm))
Numerical value of weight in relation to height. Can be used to assess whether patient is underweight, normal weight, overweight, or obese. Weight value used in calculation is latest value entered for patient. Please visit the following link for more information: Center For Disease Control And Prevention

Additional information and research articles are avialable at www.DynaPulse.com.

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