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A randomized clinical trial comparing preoperative continuation versus cessation of angiotensin converting enzyme inhibitors and angiotensin receptor blockers in patients undergoing elective, noncardiac surgery at a major tertiary hospital.

A randomized clinical trial comparing preoperative continuation versus cessation of angiotensin converting enzyme inhibitors and angiotensin receptor blockers in patients undergoing elective, noncardiac surgery at a major tertiary hospital.

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12617001365358
Acronym
PAAB
Enrollment
666
Registered
2017-09-27
Start date
2017-12-05
Completion date
2024-06-28
Last updated
2025-01-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

The research study will investigate the effect a common blood pressure tablet has on patients undergoing elective surgery. Participants will be randomly assigned to continue or cease their angiotensin converting enzyme inhibitors and angiotensin receptor blockers at least one day before their operation. Researchers will collate and analyze routinely collected patient information to detect if continuation or cessation results in better outcomes for the participants.

Interventions

Withholding angiotensin converting enzyme II inhibitors (ACEi) and angiotensin receptor blockers (ARBs) medication at least twenty-four hours prior to noncardiac surgery. The commencement of ACEi and ARB after surgery will be independent of the clinical trial and at the discretion of the treating clinician.

Sponsors

Metro South Health - Princess Alexandra Hospital
Lead SponsorHospital

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Blinded (masking used) (Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

• Adult (>18 years of age) • Non-pregnant • Patients at Princess Alexandra Hospital (Brisbane, Queensland) • Attendance at preadmission clinic at least twenty-four hours prior to day of surgery • Elective surgery • Planned general anaesthetic • Prescribed an ACEi or ARB on a stable dose for the previous twenty-eight days

Exclusion criteria

• Systolic blood pressure greater than 180 mmHg noted on preadmission clinic visit • Cardiac surgery • Transplant surgery • Cognitive impairment or other neurological disorders resulting in patients lacking capacity to provide informed consent and a legally authorized substitute decision maker (power of attorney or statutory health attorney or appointed guardian) does not exist or is unavailable to provide informed consent.

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026