Over and Under damping of A-line

Q: All of the following will cause "overdamped" arterial waveforms EXCEPT? - select one

Answer:

A) vasodilatation

B) cardiogenic shock

C) severe hypovolemia

D) aortic regurgitation

Answer: D

Overdamping results in falsely low systolic and falsely high diastolic pressure.

• aortic stenosis
• vasodilatation
• cardiogenic shock
• sepsis
• severe hypovolemia

Underdamping results in falsely high systolic pressures and falsely low diastolic pressures

• hypertension
• atherosclerosis
• vasoconstriction
• aortic regurgitation
• hyperdynamic states such as fever

#procedures

#hemodynamics

References:

1. Saugel B, Kouz K, Meidert AS, Schulte-Uentrop L, Romagnoli S. How to measure blood pressure using an arterial catheter: a systematic 5-step approach. Crit Care. 2020 Apr 24;24(1):172. doi: 10.1186/s13054-020-02859-w. Erratum in: Crit Care. 2020 Jun 23;24(1):374. doi: 10.1186/s13054-020-03093-0. PMID: 32331527; PMCID: PMC7183114.

2. Romagnoli S, Ricci Z, Quattrone D, Tofani L, Tujjar O, Villa G, Romano SM, De Gaudio AR. Accuracy of invasive arterial pressure monitoring in cardiovascular patients: an observational study. Crit Care. 2014 Nov 30;18(6):644. doi: 10.1186/s13054-014-0644-4. PMID: 25433536; PMCID: PMC4279904.