# Changing Trends in Carotid Revascularization in Australia: A Nationwide Study Over 30 Years

## TL;DR

This study examines how carotid revascularization procedures in Australia have changed over 30 years, showing a decline in surgeries and an increase in stenting.

## Contribution

The paper provides a nationwide analysis of carotid revascularization trends in Australia over three decades using two population-level datasets.

## Key findings

- Carotid endarterectomy (CEA) procedures decreased by 47.4% from 2000 to 2021.
- Carotid artery stenting (CAS) procedures increased by 23.1% during the same period.
- CEA remains more common than CAS despite the shift in trends.

## Abstract

Carotid artery stenosis is one of the causes of acute ischaemic stroke. Carotid endarterectomy (CEA) and carotid artery stenting (CAS) are the main procedural treatment options. This study investigates the changing trends in carotid revascularisation in Australia over the last 30 years.

Two population level datasets were used, the Australian Institute of Health and Welfare (AIHW) and Medicare Australia. Patients who had either CEA or CAS procedures between 1993 and 2024 were identified, and procedural trends were analyzed over a 30‐year period.

Data from AIHW was available from 2000 to 2021, over which 66 983 patients underwent carotid revascularisation (58 932 CEA and 8051 CAS). There was a 47.4% relative decrease in the absolute number of CEA procedures over the study period (3702–1948). There was a relative 23.1% increase in CAS procedures over this period (524–645). Data from the Medicare dataset was available from 1993 until 2024, over which 41 860 patients had carotid revascularisation (38 118 CEA and 3742 CAS). There was a relative 51.0% decrease in the absolute number of CEA procedures (1733–849). There was a 1.6% relative decrease in the absolute number of CAS procedures over the study period (187–184).

The number of carotid revascularisation procedures performed has steadily decreased over the last 30 years. CEA procedures have declined to a greater extent compared to CAS procedures, though CEA procedures remain significantly more common. These trends likely reflect evolving medical therapy for carotid artery disease.