Effect of prolonged pressure equalization on final drifting during pressure wire studies

Area of Science:

• Cardiovascular diagnostics
• Medical device technology
• Hemodynamics

Background:

• Pressure drifting is a common error in invasive coronary function tests.
• Accurate pressure measurements are crucial for diagnosing coronary artery disease.
• Existing methods for pressure equalization may introduce inaccuracies.

Purpose of the Study:

• To evaluate the impact of prolonged versus short-time pressure equalization on pressure drifting.
• To determine if prolonged equalization reduces the incidence of significant pressure gradients.
• To identify optimal strategies for minimizing errors in coronary pressure measurements.

Main Methods:

• Defined pressure drifting as the pressure gradient between distal wire sensor (Pd) and aortic pressure (Pa).
• Categorized significant drifts as >2 mmHg (drift 1) and >3 mmHg (drift 2).
• Employed logistic and multivariable regression to analyze associations between equalization strategies and pressure drifting.

Main Results:

• Prolonged pressure equalization significantly reduced the incidence of drift 1 (6.84% vs. 16.92%, p<0.05).
• No significant difference in drift 2 incidence was observed between strategies (4.27% vs. 7.69%, p=0.34).
• Multivariable analysis confirmed prolonged equalization as a predictor for lower drift 1 incidence.

Conclusions:

• The prolonged pressure equalization strategy is associated with a reduced incidence of significant pressure drifting.
• This strategy offers improved accuracy, particularly with more stringent drift thresholds.
• Optimizing pressure equalization techniques is vital for reliable invasive coronary function testing.