Clinical Trials Logo

Clinical Trial Summary

An abdominal aortic aneurysm (AAA) is an enlargement or ballooning of the main artery supplying high pressure blood from the heart to the body. AAAs may continue to stretch until they burst (rupture) causing 7000 deaths per year in the United Kingdom (UK); 2.1% of all deaths in men over 65. Planned repair before rupture is critical and the National AAA Screening Programme (NAAASP) is being introduced to identify AAAs in men before rupture. Screening will identify over 9000 men per year with a previously undiagnosed AAA. More than 90% of screen detected AAAs are small, do no require repair, enter ultrasound follow-up (surveillance) and may benefit from exercise to improve fitness before repair.

Over 4000 elective AAA repairs per year are performed in the UK and it has been suggested that exercise training and weight loss may reduce mortality and complications of AAA repair. This pilot study will examine the feasibility of supervised exercise training for patients with AAAs and determine the optimal duration of training to achieve worthwhile improvements in fitness.


Clinical Trial Description

Abdominal aortic aneurysm (AAA) affects 4% of men aged 65-79, a prevalence rising as our population ages. As most patients suffering rupture die immediately, elective AAA repair is critical and the National AAA Screening Programme (NAAASP) is being implemented across the UK to identify AAAs for elective repair. Manchester is the first major urban population to be screened. The UK had the highest mortality rates following elective open AAA repair in Europe (7% v 3.5%); the AAA Quality Improvement Programme's (AAAQIP) target is to reduce this to under 3.5% by 2013.

The benefits of exercise across a broad spectrum of medical conditions are now increasingly recognised; especially in the elderly. Exercise training may reduce mortality and complications in major surgery. Cardiopulmonary exercise testing (CPET) measures cardiopulmonary reserve and predicts outcome in major surgery. The Manchester CPET study group demonstrated that anaerobic threshold (AT) and peak oxygen consumption (VO2 peak) predict 30 and 90-day mortality in elective AAA repair.

The investigators propose a pilot randomised controlled trial (RCT) to determine whether a structured exercise programme improves fitness measured by CPET, and the optimal duration of training for AAA surgery. As over 90% of AAAs detected by screening are < 5.5cm and enter surveillance, these patients offer a unique opportunity to explore the ideal duration of exercise training as surgery is not indicated for months or years.

100 participants on AAA surveillance will be recruited and randomised to either exercise training or standard preoperative care (50 in each arm) to answer the following research questions:

1. Can a supervised exercise programme improve performance in CPET measures that predict outcome in AAA surgery?

2. What is the optimal period of training needed to achieve a significant improvement in CPET scores?

3. How long is any exercise-induced improvement in fitness sustained?

4. The economic and health costs of a supervised exercise training programme

Exercise subjects will attend a 60 minute supervised exercise programme of moderate intensity (70% of heart rate reserve) x3/week at a local gym. All participants will undergo CPET assessment of cardiopulmonary fitness and complete a health-related quality of life (Medical Outcomes Study 36-Item Short-Form Health Survey) at baseline and 18 weeks. The exercise subjects will undergo further CPET studies at 6, 12 and 36 weeks to investigate the duration of training needed to optimise fitness and the length of time improvements in fitness persist. Other important health related outcomes include blood pressure and lipid profile and frequency of health service visits (e.g. General Practitioner appointments) will be recorded for all participants at baseline and 18 weeks to provide data on the effects of exercise on health care costs. Longitudinal regression models, with Normal and Poisson distributions as appropriate, will be used to assess differences between the groups with respect to CPET changes, other health-related outcomes and frequency of health service visits over the whole study period. This pilot study will also explore strategies to encourage participation and compliance with exercise which may also improve general health outcomes and save National Health Service (NHS) costs by reducing demand.

The overall aim is to collect the data needed to design a definitive multicentre trial on whether physical exercise reduces morbidity and/or mortality in AAA repair.

Those aged >65 are the fastest growing segment of our population. This pilot study will contribute to public health policy drive on the impact of physical activity on functional capacity, quality of life and independence. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT01805973
Study type Interventional
Source Manchester University NHS Foundation Trust
Contact
Status Terminated
Phase N/A
Start date June 2013
Completion date May 2014

See also
  Status Clinical Trial Phase
Completed NCT02122198 - Vascular Mechanisms for the Effects of Loss of Ovarian Hormone Function on Cognition in Women N/A
Completed NCT02502812 - Bioequivalence Study of Clopidogrel 75 mg in Two Tablet Formulations Relative to Reference Tablet in Healthy Subjects Phase 1
Recruiting NCT04216342 - Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Fx-5A in Healthy Volunteers Phase 1
Completed NCT03654313 - Single and Multiple Ascending Doses of MEDI6570 in Subjects With Type 2 Diabetes Mellitus Phase 1
Completed NCT03646656 - Heart Health Buddies: Peer Support to Decrease CVD Risk N/A
Completed NCT02081066 - Identification of CETP as a Marker of Atherosclerosis N/A
Completed NCT02147626 - Heart Health 4 Moms Trial to Reduce CVD Risk After Preeclampsia N/A
Not yet recruiting NCT06405880 - Pharmacist Case Finding and Intervention for Vascular Prevention Trial N/A
Recruiting NCT03095261 - Incentives in Cardiac Rehabilitation N/A
Completed NCT02711878 - Healing Hearts and Mending Minds in Older Adults Living With HIV N/A
Not yet recruiting NCT02578355 - National Plaque Registry and Database N/A
Completed NCT02998918 - Effects of Short-term Curcumin and Multi-polyphenol Supplementation on the Anti-inflammatory Properties of HDL N/A
Completed NCT02868710 - Individual Variability to Aerobic Exercise Training N/A
Completed NCT02589769 - Effects of Reduction in Saturated Fat on Cholesterol and Lipoproteins in Lean and Obese Persons N/A
Recruiting NCT02885792 - Coronary Artery Disease in Patients Suffering From Schizophrenia N/A
Completed NCT02640859 - Investigation of Metabolic Risk in Korean Adults
Completed NCT02272946 - Effect of IL--1β Inhibition on Inflammation and Cardiovascular Risk Phase 2
Completed NCT02652975 - Anticancer Treatment of Breast Cancer Related to Cardiotoxicity and Dysfunctional Endothelium N/A
Completed NCT02657382 - Mental Stress Ischemia: Biofeedback Study N/A
Recruiting NCT02265250 - Pilot Study-Magnetic Resonance Imaging for Global Atherosclerosis Risk Assessment