What does the arterial waveform represent?

What does the arterial waveform represent?

The waveform is a diagrammatic representation of the flow of blood in the artery. It correlates directly with the ECG trace. The ECG trace is the electrical activity of the heart and the arterial waveform is a diagrammatic trace of flow of blood or mechanical response to the electrical activity.

What does the Dicrotic notch on an arterial waveform indicate?

The dicrotic notch, or incisura, which interrupts the arterial downslope, represents the closure of the aortic valve, which occurs just moments after the start of diastole. At the end of diastole, the waveform reaches its nadir.

What does a swing on an arterial line mean?

when the aortic and pulmonary valves snap shut causing pressure reverberations through the arterial. system. Flat or non-existent notch can mean that the patient is dehydrated (line trace will also ‘swing’)

What causes Overdamped arterial waveform?

There are a number of causes of an over-damped waveform. Tiny air bubbles in the tubing, a clot at the tip of the catheter, tubing that is “too” stiff or kinked and / or a catheter that is positioned against the wall of the blood vessel.

What is the cause of the Dicrotic notch and on which pressure waveform can it be seen?

The dicrotic notch and the dicrotic wave that follow it are thought to be due to a reflected pressure wave. The depth of the dicrotic notch appears to increase following infusion of vasodilators, as demonstrated by the below waveform that was recorded after infusion of hydralazine.

What is diastolic runoff?

Diastolic runoff is the part of stroke. volume that is stored in the large arteries during systole and flows to the. arterioles during diastole by means of the elastic properties of the arterial.

What causes Overdamping?

Overdamped trace Mean arterial pressure often remains the same. Causes of over damping are a kinked catheter, blocked line or air bubbles in the line. If such a trace is seen then flushing the line or removing air bubbles may restore the accurate undamped trace.

How reliable are arterial and plethysmographic waveform changes in hypovolemia?

Respiratory-induced arterial and plethysmographic (pulse oximetry) waveform changes were shown to be good predictors of cardiac output response to increased preload. The aim of this study was to evaluate the reliability of arterial and plethysmographic waveform variables in patients with mild hypovolemia.

Is pulse oximetry a reliable indicator of mild hypovolemia?

Arterial and pulse oximetry respiratory-induced changes in waveform variables are reliable indicators of mild hypovolemia in anesthetized patients. The pulse oximetry plethysmographic waveforms accurately reflect arterial waveforms during more progressive hypovolemia.

What is normal variation in arterial line waveforms during inspiration?

Respiratory variation of arterial line waveforms (on inspiration, stroke volume is increased In a spontaneously breathing patient, it is normal to observe a downward displacement of the arterial pressure baseline with each inspiration.

How do you analyze arterial and plethysmographic waveforms?

Arterial and plethysmographic waveforms were recorded and analyzed off-line at baseline and after each withdrawal of blood. Variations in arterial systolic and pulse pressure were analyzed using standard methods. Plethysmographic waveform variation and delta pulse oximetry plethysmography were determined by using pulse oximetry recordings.