Central Blood Pressure and Variability Evaluation

Learn more about:
Related Clinical Trial
The PREHAAAB Trial: Multimodal Prehabilitation for Patients Awaiting Open Abdominal Aortic Aneurysm Repair EndoVascular Aortic Repair With Sac Embolization for the Prevention of Type II Endoleaks (the EVAR-SE Study) Global Iliac Branch Study Screening for Abdominal Aortic Aneurysms in the General Practice by Ultraportable Ultrasound Clinical Effectiveness of an Off-the-shelf Single REnal Scalloped sTent-graft for HOstile NEck Infrarenal Abdominal Aortic Aneurysm A Retrospective, Observational Study to Collect Clinical Safety and Performance Data of POLYMAILLE® EXTRA THIN Vascular Prothesis A Retrospective, Observational, Multicenter, Study to Collect Clinical Safety and Performance Data on POLYMAILLE®C Abdominal Aortic Aneurysm Screening Before Coronary Artery Bypass Surgery Sex-specific Differences in AAA Complexity EndurAnt Stent Graft System vs ExcluDer Endoprothesis: a Global, prospectiVe, rANdomized Clinical Trial in Sac rEgression (ADVANCE Study) Central Blood Pressure and Variability Evaluation Evaluation of the Impact of Prehabilitation on Recovery Following Open Surgery for Abdominal Aortic Aneurysm Low-dose Colchicine Inhibit Abdominal Aortic Aneurysm Growth Trial Elective Treatment Rates and Surgical Non-eligibility Among Men and Women With Intact Abdominal Aortic Aneurysms Anatomical and Perioperative Predisposing Factor for LIMb Occlusion of IncrafT Infrarenal Endograft Optimizing CO2 Injection Technique for EVAR A PROpensity Score Matching Analysis on ENDovascular vs Open Thoraco-Abdominal Aortic Aneurysm Repair (PRO-ENDO TAAA Study) ALTo endogrAft Italian Registry Sex-specific Differences in the Stress Response to Abdominal Aortic Aneurysm Repair AAA Rupture Risk Assessment in COVID-19 Pandemic Hellenic Registry of Ovation Alto™ Abdominal Stent Graft System Ultrasound Velocimetry in the Abdominal Aorta Before and After Endovascular Aneurysm Repair Real-World Data Collection of the GORE® VIABAHN® VBX Balloon Expandable Endoprosthesis When Used as a Bridging Stent With Branched and Fenestrated Endografts in the Treatment of Aortic Aneurysms Involving the Renal-Mesenteric Arteries Registry of Patients Treated by Preloaded Fenestrated Stent-graft Designs for Complex Endovascular Aortic Procedures (PLD.REG.) First In Human Study for Small to Medium-sized Abdominal Aortic Aneurysm (AAA) Retrospective Post-Market Clinical Follow-Up Study of GORE-TEX® Vascular Grafts and GORE® PROPATEN® Vascular Graft in Peripheral Artery Disease, Aortic Aneurysms, and Dialysis Access Assessment of the Endovascular Aortic Aneurysm Repair’s (EVAR) Main Body Lateral Movement Impact on the Rate of Reintervention After AAA’s Treatment ViTAA Registry Pre- and Post-Operative Monitoring for Endovascular Aortic Aneurysm Repair and Serial Monitoring for Abdominal Aortic Aneurysm Complementary and Alternative Medicine Interventions in Targeting Pain DOTATATE PETMRI AAA Study Abdominal Aortic Aneurysm Sac Healing and Prevention of Endoleaks – Netherlands An Innovative Approach to Automated Carbon Dioxide Angiography During Endovascular Abdominal Aortic Aneurysm Repair Impact of Intra- and Postoperative Continuous Infusion of Lidocaine on Analgesia in Vascular Anaesthesia Detecting Abdominal Aortic Aneurysms in First Degree Relatives (Adult Offsprings) to AAA Patients (DAAAD) Contrast Enhanced Ultrasound Endoleak Identification and Classification CCR2 AAA Pilot Study NIH CCR2 AAA Study Predicting Endoleaks Following Endovascular Aortic Aneurysm Repair Using 18F-Sodium Fluoride Comparative Study of a Software With the Gold Standard Limiting AAA With Metformin (LIMIT) Trial Deep Learning Applied to Plain Abdominal Radiographic Surveillance After Endovascular Aneurysm Repair (EVAR) of Abdominal Aortic Aneurysm (AAA) Carbon Dioxide Guided Angiography in Endovascular Abdominal Aortic Aneurysm Repair MuLtibranchEd Graft for OPen RepAir of ThoRacoabdominal Aneurysms Aneurysm Diameter and Surgical Outcome Evaluation of the Long Term Efficacy of Endovascular Treatment of Type 2 Endoleaks Point-of-care Ultrasound in Finland BNP and Vascular Surgery Understanding the Role of Autoimmune Disorders on the Initial Presentation of Cardiovascular Disease Heart Rate and Initial Presentation of Cardiovascular Diseases (Caliber) Social Deprivation and Initial Presentation of 12 Cardiovascular Diseases: a CALIBER Study The Effects of Anesthesia on Patients Undergoing Surgery for Repair of a Thoracoabdominal Aneurysm. The Role of Alcohol Consumption in the Aetiology of Different Cardiovascular Disease Phenotypes: a CALIBER Study Body Mass Index and Initial Presentations of Cardiovascular Diseases Totally Percutaneous Approach to Endovascular Treatment of Aortic Aneurysms (PEVAR-PRO) Haemostasis Management of Abdominal Aortic Procedures Overlay of 3D Scans on Live Fluoroscopy for Endovascular Procedures in the Hybrid OR Evaluation of the Safety and Efficacy of the Multilayer Stent Serum Uric Acid Levels and Onset of Cardiovascular Diseases: a CALIBER Study Ethnicity and Onset of Cardiovascular Disease: A CALIBER Study Fenestrated AAA Endovascular Graft Post-Approval Study Preconditioning Shields Against Vascular Events in Surgery Zenith Low Profile AAA Endovascular Graft (ZLP) Clinical Study Terumo Aortic Global Endovascular Registry A Study of Remote Ischaemic Preconditioning in Patients With Atherosclerosis Undergoing Vascular Surgery Preconditioning Shields Against Vascular Events in Surgery Risk Factors in the Initial Presentation of Specific Cardiovascular Disease Syndromes White Blood Cell Counts and Onset of Cardiovascular Diseases: a CALIBER Study Contrast-enhanced Ultrasound in Follow-up After Endovascular Aneurysm Repair Use of Fish Oil to Reduce Inflammation During Endovascular Abdominal Aortic Repair Contrast Enhanced Ultrasound, Endoleak Detection Following EVAR v1.3 Glycemic Control to Prevent Cardiac Morbidity in Vascular Surgery Performance and Safety of a Second Generation Antimicrobial Graft in Abdominal Position AneuFix – Prophylactic Sac Filling ANEUFIX for Endoleak Type II Repair Endurant Evo US Clinical Trial The Use of Carbon Dioxide as a Contrast Media for Performing Endovascular Procedures A Study of the Safety of Targeted AAA Screening Zenith® Low Profile AAA Endovascular Graft Zenith® Low Profile AAA Endovascular Graft Zenith(R) Low Profile AAA Endovascular Graft Clinical Study Hemodynamic Changes After Aortic Aneurysm Treatment With Stent-Graft Zenith® AAA Endovascular Graft Clinical Study Talent Converter Post-Approval Study Arterial Stiffness, Blood Pressure and Cardiac Output Study LIFE Study: Least Invasive Fast-Track EVAR DynaCT in Preoperative Imaging Before Insertion of Stentgraft TriVascular European Union (EU) Abdominal Stent Graft Trial Percutaneous Endovascular Aneurysm Repair (PEVAR) Trial Biomarkers of Aneurysm Wall Strength Post Implant Syndrome After EVAR and EVAS (INSPIRE Study) Control Post Endovascular Treatment of Aortic Aneurisms Through Magnetic Resonance and Ultrasound (SAFEVAR) Estimation of Biomechanical Aortic Wall Properties in Healthy and Aneurysmal Aortas Using Novel Imaging Techniques ANEUFIX for Endoleaks Type II TriVascular Canadian LIFE Study: Least Invasive Fast-Track EVAR (Endovascular Aneurysm Repair) Screening Cardiovascular Patients for Aortic aNeurysms (SCAN) Emergency Department Ultrasound in Renal Colic Endurant Evo International Clinical Trial Physician Modified Endovascular Grafts Talent Aortic Cuff Stent Graft System Compassionate Use Registry Fusion of CT Angiography With 3D Contrast Ultrasound as a Method for Follow up for Endovascular Aneurysm Repair Evaluation of a New Imagingtechnologie for Thrombosis The Effect of Surgery on Central Aortic Pressure & haEmodynamics Study Image Fusion of Preprocedural CTA With Real Time Fluoroscopy to Enhance EVAR Repair Post-operative CT Follow up After Nellix Endoprosthesis Implantation Endovascular Exclusion of TAAA/AAA Utilizing Fenestrated/Branched Stent Grafts Zenith® p-Branch™: Single-Center Study Observatory of Screening Aneurysms of the Abdominal Aorta During Echocardiography. National Epidemiological Survey Female Aneurysm Screening STudy The Pivotal Study of the Aptus Endovascular AAA Repair System Endovascular Treatment of Aorto-iliac Disease Using in Situ Fenestration Interest of a Post-operative Ultrasound With Systematic Use of Ultrasonic Contrast in the Follow-up of Aortic Endoprosthesis: Prospective Study at the University Hospital of Nice Zenith® Fenestrated Abdominal Aortic Aneurysm (AAA) Endovascular Graft Continued Access Study Endovascular Aneurysm Repair (EVAR) Gate Study Powerlink Bifurcated Stent Graft Long-Term Follow-up Study Screening Cardiovascular Patients for Aortic Aneurysms Zenith(R) Fenestrated Abdominal Aortic Aneurysm (AAA) Endovascular Graft Clinical Study Global Fenestrated Anaconda Clinical sTudy TriVascular Post-Market Registry Vasovist Endoleak Study AAA Registry: Clinical Outcomes of Highly Angulated anatomY Treated With the Aorfix™ Stent Graft Italian Multicenter Database for Open Conversions After EVAR Evaluation of the Endovascular Repair for Aortic Aneurysm (EVAR) Program at LHSC Preoperative Methylprednisolone in Endovascular Aortic Repair Prospective Aortic Biobank of POP-STAR E-tegra Stent Graft System in the Treatment of Infra-renal Abdominal Aortic Aneurysms EValuation of Systemic Atherothrombosis in Patients With ARTerial Disease of the Lower Limbs A Clinical Study to Evaluate the Safety and Performance of the Modular AAA Stent-Graft System Prospective Aneurysm Trial: High Angle Aorfix™ Bifurcated Stent Graft The Vascutek Custom Fenestrated Anaconda Post-Market Surveillance Study Advanced MRI in AAA Korean Registry of Percutaneous EVAR With INCRAFT Stent Graft for the Treatment of Abdominalaortic Aneurysm (K-INCRAFT) Safety and Efficacy of the SETA LATECBA Stent Graft for EVAR in Subjects With AAA UVA Brain and Aortic Aneurysm Study Acute Technical Outcomes of the Talent Abdominal Aortic Aneurysm (AAA) Stent-Graft Versus Cook Zenith Stent-Graft South American Abdominal Stent Graft Trial Zenith® Spiral-Z® AAA Iliac Leg Graft Post-market Registry AneuRx Post Market Study in the Treatment of AAA Predicting Aneurysm Growth and Rupture With Longitudinal Biomarkers The Boston Scientific ENOVUS Trial The (PIVOTAL) Study Suprarenal Proximal Cuff Study for Treatment of Abdominal Aortic Aneurysm Relation betwEen Abdominal Aorta and Carotid Artery Responses to SymPathetic stimulatiON uSing duplEx Ultrasound ARBITER-II: Aorfix™ Bifurcated Safety and Performance Trial: Phase II, Angulated Vessels Evaluation of Predictors of Aortic Aneurysm Growth and Rupture Compassionate Use of the Incraft® AAA Stent Graft System Aortic Distensibility Randomized Preventive Vascular Screening Trial of 65-74 Year Old Men in the Central Region of Denmark CRD007 for the Treatment of Abdominal Aorta Aneurysm (The AORTA Trial) ACT Guided Heparinization During Open Abdominal Aortic Aneurysm Repair. Cross-sectional Study of Prevalence Rate of Abdominal Aortic Aneurysm in OSAHS Patients From BTCH Mechanism and Prevention of Remote Organ Injury Following Ruptured Aortic Aneurysm Study of Abdominal Aortic Stent Grafts in the Treatment of Infrarenal Abdominal Aortic Aneurysms Study on Anti-inflammatory Effect of Anti-hypertensive Treatment in Patients With Small AAA’s and Mild Hypertension DynaCT Imaging in EVAR: Comparing Clinical Benefit of DynaCT to Multidetector CT as the Current Gold Standard. Zenith® LP Abdominal Aortic Aneurysm (AAA) Post-Market Registry Endovascular Exclusion of Thoracoabdominal and/or Paravisceral Abdominal Aortic Aneurysm Safety and Efficacy of Allogeneic MSCs in Promoting T-regulatory Cells in Patients With Small Abdominal Aortic Aneurysms Post-Market Study to Assess Outcomes of Patients Treated With AFX System Compared to Other EVAR Devices Dutch Randomised Endovascular Aneurysm Management (DREAM-) Trial Metformin Therapy in Non-diabetic AAA Patients Tonometry(1) and Duplex Ultrasound(2) to Predict CV Events in to be Treated Patients With an AAA Tonometry and Duplex Ultrasound to Predict AAA Progression and CV Events in Aneurysm Patients (1-2-3 Trial) Endoprosthesis Treatment Effects on Human Abdominal Aorta Aneurysms (AAA) Metabolic Activity Surviving Aneurysm Surgery: A Pilot Study on Exercise Training in Abdominal Aortic Aneurysm Patients Treovance Stent-Graft With Navitel Delivery System for Patients With Infrarenal Abdominal Aortic Aneurysms Cyclosporine A in Patients With Small Diameter Abdominal Aortic Aneurysms Intraoperative Assessment of Pulsatile Aneurysm Wall Motion During Endovascular Aneurysm Repair Curcumin to Prevent Complications After Elective Abdominal Aortic Aneurysm (AAA) Repair Post Implantation Syndrome and Administration on NSAIDs in Patients Undergoing EVAR for AAA LUCY Study: TriVascular Evaluation of Females Who Are Underrepresented Candidates for Abdominal Aortic Aneurysm Repair Elective Abdominal Aortic Aneurism – Open Versus Endovascular Repair TriVascular Evaluation of Females Who Are Underrepresented Candidates for Abdominal Aortic Aneurysm Repair in Europe Statin Use in Abdominal Aortic Aneurysm Repair GORE® EXCLUDER® Endoprosthesis French Mandatory Registry Endovascular Exclusion of Abdominal Aortic Aneurysms in High Risk Patients Aneurysma Hernia Study – Incidence of Incisional Hernias After Abdominal Aortic Aneurysm Repair Predictors of AAA Expansion and/or Rupture Non-invasive Monitoring of Endovascular Repair of Abdominal Aortic Aneurysm (VBA) Comparison of Beta-blocker Versus Angiotensin Receptor Blocker for Suppression of Aneurysm Expansion in Patients With Small Abdominal Aortic Aneurysm and Hypertension (BASE Trial) Preferences for Open Vs. Endovascular Repair for Abdominal Aortic Aneurysm Pharmacokinetics of CRD007 in Patients With Abdominal Aorta Aneurisms. Study of the Endovascular QUANTUM LP™ Stent Graft System in Abdominal Aortic Aneurysms (AAA) Immediate Management of the Patient With Rupture : Open Versus Endovascular Repair Study of the Glycocalyx in Abdominal Aortic Aneurysm Effect of Pre-operative Exercise in Abdominal Aortic Aneurysms (AAA) Patients. Validation of Fenestrations Positioning by Numerical Simulation Prevalence and Screening of Abdominal Aortic Aneurysms Among Men With Coronary Artery Disease START – Early Thrombocyte Administration to Patients With Ruptured Abdominal Aortic Aneurism Intraoperative Perfusion Patterns of the Sigmoid Colon During Elective Open Abdominal Aortic Aneurysm Repair The Inter and Intra Reliability of Cardiopulmonary Exercise Testing in Abdominal Aortic Aneurysm Patients Prevalence of Carotid Artery Stenosis and Abdominal Aortic Aneurysms in Brussels: a Population-based Screening Study. Screening of Abdominal Aortic Aneurysms Among Male Patients With TIA Symptoms The Nellix® EndoVascular Aneurysm Sealing System for the Treatment of Infrarenal Abdominal Aortic Aneurysms Screening of Abdominal Aortic Aneurysms Among Men With Coronary Artery Disease Cordis Bilateral AAA Device Compared to Open Surgical Repair of Abdominal Aortic Aneurysms (ARIBA) A Large Surgical Registry for Abdominal Aortic Aneurysms (AAA) Circulating microRNAs and Degenerative Abdominal Aorta Aneurysm Follow-up After Endovascular Repair of Abdominal Aortic Aneurysm Abdominal Aortic Aneurysms and Pseudoexfoliation Syndrome The Efficacy of Ticagrelor on Abdominal Aortic Aneurysm (AAA) Expansion Physician-Sponsored IDE for Talent Endoluminal Spring Graft System in Patients With Abdominal Aortic Aneurysms (AAA) Impact of Limb Remote Ischemic Preconditioning on Mortality and Quality of Life During Abdominal Aortic Aneurysm Repair Magnetic Resonance Elastography in Patients With Abdominal Aortic Aneurysms 34mm Cuff Study for Endovascular Repair of Abdominal Aortic Aneurysms Metformin for Abdominal Aortic Aneurysm Growth Inhibition Clinical Study of Abdominal Aortic Aneurysm Exclusion (TALENT Abdominal) A Phase I Evaluation of the Safety of the TriVascular Stent-Graft System in the Treatment of Abdominal Aortic Aneurysms Screening for Abdominal Aortic Aneurysm and Abdominal Aortic Atherosclerosis by Hand-Held Ultrasonography Clinical Study of the Treovance Stent-Graft for Patients With Abdominal Aortic Aneurysms Development of Novel Imaging Markers Predicting the Progression of Abdominal Aortic Aneurysm Using 3D Computed Tomography Structured Exercise Programme and Abdominal Aortic Aneurysm Surgery Study of the Effectiveness of Telmisartan in Slowing the Progression of Abdominal Aortic Aneurysms Evaluation of Effect of Angiotensin-converting Enzyme (ACE) Inhibitors on Small Aneurysm Growth Rate A Prospective Analysis on the Expansion Rates of Abdominal Aortic Aneurysms Reduction of Myocardial Infarction by Preconditioning in Patients With Ruptured Abdominal Aortic Aneurysm Magnetic Resonance Imaging To Predict Outcomes In Aortic Aneurysms Abdominal Aortic Aneurysm Sac Healing and Prevention of Endoleaks A MULTICENTER, OPEN LABEL, PROSPECTIVE, NON-RANDOMIZED STUDY OF INCRAFT™ IN SUBJECTS WITH ABDOMINAL AORTIC ANEURYSMS (INNOVATION) Abdominal Aortic Aneurysm Surgery and Thrombosis Ultra-sound for AAA Screening in Smoking Israeli Arab Men Prophylactic Mesh Implantation After Abdominal Aortic Aneurysm Repair Compassionate Use Treatment for a Single Patient With a Custom Made Branched/Fenestrated Endovascular Device for the Treatment of Complex Abdominal Aortic Aneurysm Comparison of Methods to Improve Abdominal Aortic Aneurysm (AAA) Screening Rates in the Primary Care Setting. Safety Study for the Treatment of Abdominal Aortic Aneurysms Prevention of Incisional Hernia After Elective Open Abdominal Aortic Aneurysm (AAA) Repair Sodium Fluoride Imaging of Abdominal Aortic Aneurysms Biomarker Profiling in Abdominal Aortic Aneurysm Patients Vascutek Anaconda™ Abdominal Aortic Aneurysm (AAA) Post-Market Surveillance Registry Limb Remote Ischemic Preconditioning Reduces Heart and Lung Injury After Abdominal Aortic Aneurysm Repair China Post-market Study of the INCRAFT® AAA Stent Graft System in Subjects With Abdominal Aortic Aneurysms (INITIATION) Screening for Thoracic Aortic Aneurysm Among a Cohort of Patients With a Degenerative Abdominal Aortic Aneurysm A Multicenter, Open Label, Prospective, Non-randomized Study of the InCraft® Stent Graft System in Subjects With Abdominal Aortic Aneurysms (INSPIRATION) Prevention of Endoleaks Using Autologous Platelet Gel on Unruptured Abdominal Aortic Aneurysms Screening for Abdominal Aortic Aneurysm in 65 Year Old Males in Oslo European (EU) Post Approval Study of the INCRAFT® AAA Stent Graft System in Subjects With Abdominal Aortic Aneurysms Prevention of Type II Endoleaks During Endovascular Treatment of Abdominal Aortic Aneurysm: Endovascular Treatment Versus Combination With Coil Embolisation of the Aneurysmal Sac HORIZON CE Pivotal Study to Treat Abdominal Aortic Aneurysm Screening Programme for Abdominal Aortic Aneurysm by Hand-Held-Ultrasonography in Primary Health Care ACZ885 for the Treatment of Abdominal Aortic Aneurysm Measurement of Maximum Diameter of Native Abdominal Aortic Aneurysm by Angio-CT Intact Abdominal Aortic Aneurysm Repair in Portugal The Altura Abdominal Aortic Aneurysm (AAA) Endograft Safety and Feasibility Study

Brief Title

Central Blood Pressure and Variability Evaluation

Official Title

Investigation Into the Effects of Central Blood Pressure Variability and Antihypertensive Adherence on the Size and Growth Rate of Abdominal Aortic Aneurysms

Brief Summary

      Background: A sub-study of the AARDVARK (Aortic Aneurysmal Regression of Dilation: Value of
      ACE-Inhibition on RisK) trial indicated a statistically significant association between
      central blood pressure (BP) variability and abdominal aortic aneurysm (AAA) growth. The role
      of anti-hypertensive adherence has not been explored in the context of AAA growth.

      Objective: To confirm whether higher central BP variability is associated with higher AAA
      growth rates and to examine the effect of medication adherence on AAA growth rates in a
      prospective longitudinal cohort study.

      Methods: Up to 175 patients will be recruited over ten months from two sites with
      standardised quality control of AAA, BP and antihypertensive non-adherence measurement.
      Patients (>55 years), with AAAs ≥3cm in diameter (including AAA ≥5.5cm, not proceeding to
      surgery) will be recruited and undergo AAA ultrasound (US), BP (peripheral and central) and
      antihypertensive non-adherence measurements every four months (+/- one month) for 24 months.
      Ambulatory BP variability data will be collected. Data on medication adherence and beliefs
      around medications will be collected with validated questionnaires.

      Analysis: Primarily, the relationship between central diastolic BP visit-to-visit variability
      and AAA growth (estimated by multilevel modelling) based on US measurements and secondarily
      the relationship between central diastolic BP variability and time taken to reach the
      threshold for AAA repair (5.5 cm) or rupture.
    

Detailed Description

      The AARDVARK (Aortic Aneurysmal Regression of Dilation: Value of ACE-Inhibition on RisK)
      trial was designed to investigate the hypothesis that an ACE-inhibitor (perindopril) would
      reduce growth rate of small AAAs in a three-arm randomised placebo-controlled trial. While
      this didn't show a significant effect, results from an in-trial sub-study (CAVE study)
      demonstrated a significant relationship between central BP variability and aneurysm growth
      rates. This requires confirmation, in a dedicated study.

      Design:

      This is a multicentre prospective longitudinal observational cohort study. Each patient will
      have a study visit every 4 months with a minimum of 6 clinical visits where the study team
      will collect demographic data; psychological data (short form questionnaires that can be
      independently filled in); and physical data. The study team will also access routinely
      collected NHS cross-sectional imaging for comparison throughout the study, as quality
      control. No additional procedures involving ionising radiation will take place.

      Study timeline:

      There will be a 10-month recruitment period; all subjects will attend visits for a period of
      18-24 months. The data collection will continue for 24 months in total. There will be a
      6-month period of data analysis and write up.

      Recruitment:

      A cohort of up to 175 patients will be recruited from two trusts in London comprising four
      hospitals - Imperial College Healthcare NHS Trust (ICH) at St Mary's and Charing Cross
      hospitals, and London North West University Healthcare Trust (LNWH) at Northwick Park and
      Hillingdon hospitals. All visits and measurements will take place at central sites (St Mary's
      and Northwick Park hospitals).

      Data Collection:

        1. Demographic data - e.g. current prescribed anti-hypertensive medication and other
           cardiovascular medications, height and weight, medical history, smoking status

        2. Psychological data - three short-form questionnaires that can be independently filled in
           by participants. Questionnaires will constitute measures of anxiety and depression
           (Hospital Anxiety and Depression Score [HADS]), current medication adherence (modified
           Voils Adherence Score), and beliefs around medication and adherence (Beliefs about
           Medicines Questionnaire [BMQ]).

        3. Physical data - sitting mean peripheral and central systolic and diastolic BP,
           visit-to-visit central systolic and diastolic BP variability measured as standard
           deviation, coefficient of variation and variation independent of the mean will be
           measured using a validated arm cuff-based method. Ambulatory BP parameters will be
           measured using a validated monitor. USS AAA measurement will take place at bedside in
           supine position with outer-to-outer (OTO) calliper placement.

      Primary Endpoint Analysis:

      The association between central BP variability measured as standard deviation and AAA growth
      will be analysed using regression models where BP variability is the exposure and AAA growth
      is the outcome.

      Random effects multilevel models where level-1 units are AAA repeated measurements nested
      within patients (level-2 units) will be used to estimate AAA growth. To explore non-linearity
      in AAA growth appropriate modelling will be used eg. linear splines.

      Secondary Endpoints Analyses:

      Survival analysis techniques such as Cox proportional hazards models will be used to assess
      the relationship between central BP variability and time taken for the AAA to reach the
      threshold for intervention (5.5 cm) or rupture.

      Associations between haemodynamic parameters and aneurysm growth rate will be investigated.
      For each of the other measurements of systolic and diastolic central BP variability
      (coefficient of variation (SD ÷ mean) and variation independent of the mean calculated as
      SD÷(mean x) where x is determined empirically by curve fitting) and for other BP and
      haemodynamic parameters studied, the same multilevel model or generalised linear models will
      be used to estimate AAA growth. All analyses will be adjusted for an a-priori list of
      confounding variables.
    


Study Type

Observational [Patient Registry]


Primary Outcome

Growth

Secondary Outcome

 Time to rupture or repair

Condition

AAA



Publications

* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.

Recruitment Information



Estimated Enrollment

175

Start Date

June 7, 2022

Completion Date

May 2024

Primary Completion Date

May 2024

Eligibility Criteria

        Inclusion Criteria:

          -  Willing and able to give written informed consent

          -  infrarenal aneurysms of ≥3cm in size (to include AAA ≥5.5cm in those not proceeding to
             surgery)

        Exclusion Criteria:

          -  Patient's with a known genetic aetiology of their AAA

          -  age<55

          -  known bilateral proximal upper extremity obstructive lesions

          -  persistent cardiac arrhythmia

          -  those unable to give informed consent

          -  those too frail to travel for four monthly surveillance

          -  any clinically significant medical condition which, in the opinion of the
             investigator, may interfere with the study results and/or reduce life expectancy to <
             2 years

          -  participation in another trial of an investigational product or device within the
             previous 30 days

          -  unable or unwilling to comply with the requirements of the study, in the opinion of
             the investigator
      

Gender

All

Ages

55 Years - N/A

Accepts Healthy Volunteers

No

Contacts

, 02033126072, [email protected]

Location Countries

United Kingdom

Location Countries

United Kingdom

Administrative Informations


NCT ID

NCT05376514

Organization ID

22SM7440


Responsible Party

Sponsor

Study Sponsor

Imperial College Healthcare NHS Trust

Collaborators

 London North West Healthcare NHS Trust

Study Sponsor

, , 


Verification Date

August 2022