Work

Noninvasive cardiac output measurements are inaccurate in patients with severe aortic valve stenosis undergoing transcatheter aortic valve implantation

Year: 2021

Type: article

Abstract: BACKGROUND: Noninvasive cardiac output (CO) measured using ClearSight™ eliminates the need for intra-arterial catheter insertion. The purpose of this study was to examine the accuracy of non-invasive CO measurement in patients with severe aortic valve stenosis (AS). METHODS: Twenty-eight patients undergoing elective transcatheter aortic valve implantation were prospectively enrolled in this study. The CO was simultaneously measured twice before and twice after valve deployment (total of four times) per patient, and the CO was compared between the ClearSight (COClearSight) system and the pulmonary artery catheter (PAC) thermodilution (COTD) method as a reference. The Bland-Altman analysis was used to compare the percentage errors between the methods. RESULTS: A total of 112 paired data points were obtained. The percentage error between the COClearSight and COTD was 43.1%. The paired datasets were divided into the following groups according to the systemic vascular resistance index (SVRI): low (< 1,200 dyne s/cm5/m2) and normal (1,200-2,500 dyne s/cm5/m2). The percentage errors were 44.9% and 49.4%, respectively. The discrepancy of CO between COClearSight and COTD was not significantly correlated with SVRI (r = -0.06, P < 0.001). The polar plot analysis showed the trending ability of the COClearSight after artificial valve deployment was 51.1% which below the acceptable cut-off (92%). CONCLUSIONS: The accuracy and the trending ability of the ClearSight CO measurements were not acceptable in patients with severe AS. Therefore, the ClearSight system is not interchangeable with the PAC thermodilution for determining CO in this population.

Source: Korean Journal of Anesthesiology

DOI: 10.4097/kja.21324

Authors: Musashi Yahagi, Kyuma Omi, Takuma Maeda

Institutions: Hitachi General Hospital, Hitachi (Japan), National Cerebral and Cardiovascular Center

Language: English

Topic: Hemodynamic Monitoring and Therapy

Subfield: Surgery

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: diamond

Funders: Edwards Lifesciences, University of Tsukuba