Construct Validity of a Novel Fiberoptic TAVR Guidewire for Invasive Pressure Measurements.

Versteeg, GAA, Westerhof, MAB, Stens, NA, Meuwese, J, van Wely, MH, Dimitriu-Leen, AC, van Geuns, R-JM, van Garsse, LAFM, Geuzebroek, GSC, Verkroost, MWA, Nauta, FJH, Cetinyurek-Yavuz, A, Tonino, PAL, Heijmen, RH, Thijssen, DHJ ORCID: 0000-0002-7707-5567, van Nunen, LX and van Royen, N (2026) Construct Validity of a Novel Fiberoptic TAVR Guidewire for Invasive Pressure Measurements. JACC. Advances. p. 103219. ISSN 2772-963X

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Abstract

Background
A novel fiberoptic transcatheter aortic valve replacement (TAVR) guidewire was developed that enables continuous hemodynamic monitoring, easy pacing over the wire, and guiding of the valve prosthesis.

Objectives
This study aimed to evaluate construct validity of hemodynamic measurements obtained with the fiberoptic TAVR guidewire compared to conventional fluid-filled pigtail catheters.

Methods
This prospective registry study included patients undergoing TAVR. Complete hemodynamic assessment was performed in-duplo with the fiberoptic TAVR guidewire and conventional pigtail catheters. Primary endpoint was the agreement between modalities for post-TAVR mean pressure gradient (PG). Secondary endpoints included agreement in assessing paravalvular regurgitation and in-depth signal analysis using a validated automated algorithm.

Results
This study included 150 patients (mean age 79.7 ± 5.8 years; 46.7% female). Comparison of invasive pressure measurements yielded moderate to excellent agreement (intraclass correlation coefficient [ICC]-range: 0.65 to 0.95). Bias was observed in left ventricular end-diastolic pressure (LVEDP), with the fiberoptic guidewire measuring higher LVEDPs (+3.5 mm Hg). Post-TAVR mean PG showed a mean absolute difference of 2.7 ± 2.1 mm Hg (ICC: 0.67), minimal bias (−0.45 mm Hg), and 87% concordance with a discrete cutoff (10 mm Hg). Good overall agreement was observed for most indices of paravalvular regurgitation (ICC-range: 0.81-0.87). Automated algorithm assessment revealed fewer artefacts and calibration errors for the fiberoptic guidewire (P = 0.048), repeat analysis improved mean PG agreement (ICC-range: 0.80-0.85).

Conclusions
The fiberoptic guidewire effectively classified clinically relevant transvalvular gradients with limited bias post-TAVR, although it produced higher LVEDPs, possibly reflecting wire-induced leaflet interaction. Algorithm-derived assessment revealed the fiberoptic guidewire producing measurements with fewer artefacts and calibration errors, supporting its proof-of-concept potential to complement current invasive assessment standards.

Item Type:	Article
Uncontrolled Keywords:	aortic valve stenosis; construct validity; hemodynamics; invasive measurements; savvywire; transcatheter aortic valve replacement; 32 Biomedical and Clinical Sciences; 3202 Clinical Sciences; Bioengineering; Transplantation; Cardiovascular; 3 Good Health and Well Being
Subjects:	R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions:	Sport and Exercise Sciences
Publisher:	Elsevier BV
Date of acceptance:	13 August 2026
Date of first compliant Open Access:	15 October 2026
Date Deposited:	15 Oct 2026 10:19
Last Modified:	15 Oct 2026 10:19
DOI or ID number:	10.1016/j.jacadv.2026.103219
URI:	https://researchonline.ljmu.ac.uk/id/eprint/29678

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