Adrenal Vein Sampling: Does the Location of the Non-adrenal Venous Sample Matter?

Overview

Journal Cardiovasc Intervent Radiol

Specialty Cardiology & Vascular Diseases

Date 2024 Jan 11

PMID 38212421

Authors

Florian Wernig

Aleksandra Dunin-Borkowska

Angelos Frisiras

Bernard Khoo

Jeannie Todd

Aimee Di Marco

F Fausto Palazzo

Sophie C Barnes

Tricia M Tan

Karim Meeran

Ali Alsafi

Affiliations

Soon will be listed here.

Abstract

Purpose: Adrenal vein sampling (AVS) is used to lateralise and differentiate unilateral from bilateral aldosterone production in primary aldosteronism. The adrenal venous samples are standardised to a peripheral or low inferior vena cava (IVC) sample and compared. It is unknown whether the location of the non-adrenal sample affects the results. This study compares AVS results standardised to the low IVC and right external iliac vein (REIV).

Methods: Patients who underwent AVS between March 2021 and May 2023 were included. All procedures were undertaken by a single operator (AA). Demographic data and AVS results were collected from patients' electronic records. Catheterisation success and lateralisation were assessed using both low IVC and REIV samples. Equivalence test was used to compare the cortisol and aldosterone levels.

Results: Eighty-one patients, (M: F = 38:43), aged between 29 and 74 were included. Bilateral successful adrenal vein cannulation was achieved in 79/81 (97.5%) cases. The mean cortisol levels from the REIV were statistically equivalent although there was a small and not biologically significant difference from the low IVC (respective geometric means 183 nmol/l vs. 185 nmol/l, p = 0.015). This small difference in cortisol may be due to accessory adrenal venous drainage into the IVC. The aldosterone and aldosterone/cortisol ratios were statistically equivalent. There was no discordance in selectivity or lateralisation when the IVC or REIV measurements were used.

Conclusion: The IVC and REIV samples may be used interchangeably during AVS.

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