A new intracoronary measurement catheter, MetriCath, compared to intravascular ultrasound and quantitative coronary angiography in a stented porcine coronary model

Willem J. Van Der Giessen, Stephane G. Carlier, Evelyn Regar, Heleen M.M. Van Beusekom, David P. Foley, Pim J. De Feyter, Pieter D. Verdouw, Eric Boersma, Roger Wolthuis, Patrick W. Serruys

Research output: Contribution to a Journal (Peer & Non Peer)Articlepeer-review

6 Citations (Scopus)

Abstract

The purpose of this study was to compare measurements by MetriCath to intravascular ultrasound (IVUS) and quantitative coronary angiography (QCA). The MetriCath system consists of a low-pressure (200 mm Hg) balloon catheter connected to a pressure transducer and infusion pump linked to a computer that records pressure-volume curves. Cross-sectional area of blood vessels is obtained directly from the unrestrained and in-stent pressure-volume measurements. We compared stent cross-sectional area measurements by MetriCath, IVUS, and QCA in a porcine stented coronary artery model. Comparison of area measurements in 14 stents showed no significant differences between the three methods (P = 0.66). On average, values differed 0.37 ± 0.60 mm2 between MetriCath and QCA, 0.13 ± 0.55 mm2 between MetriCath and IVUS, and 0.22 ± 0.80 mm2 between IVUS and QCA. This corresponds to 6.2% ± 10%, 3.0% ± 9.0%, and 3.1% ± 12.9% relative difference from the average of two corresponding measurements. Linear regression analysis showed excellent correlation between measurements (r = 0.99 for all comparisons). The differences in in-stent area measurements between MetriCath and both QCA and IVUS were small. Considering the ease and rapidity of obtaining MetriCath results, this technique may form an alternative to the others in evaluating stent expansion. Based on these findings, clinical evaluation seems warranted.

Original languageEnglish
Pages (from-to)2-9
Number of pages8
JournalCatheterization and Cardiovascular Interventions
Volume57
Issue number1
DOIs
Publication statusPublished - Sep 2002
Externally publishedYes

Keywords

  • Coronary dimensions
  • Intravascular ultrasound
  • Methodology
  • Pressure volume
  • Quantitative coronary angiography

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