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CompletedNCT00552812COASTUpdated Mar 11, 2016Results posted

Coarctation Of the Aorta Stent Trial

An interventional study of Stent therapy of aortic coarctation in Coarctation of the Aorta, sponsored by Richard E. Ringel. Completed at 1 site in United States. Open to participants aged 8 Years to 60 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2016-03-11.

Sponsored by Richard E. Ringel · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
105
Allocation
Not applicable
Ages
8 Years to 60 Years
Sex
All
01

Study summary

The purpose of this study is to determine whether Cheatham Platinum bare metal stents are safe and effective in the treatment of native and recurrent aortic coarctation in selected children, adolescents and adults.

Read the detailed description

The goals of this study are to provide information that will support labeling of both the CP bare metal and covered stents to treat native and recurrent aortic coarctation in selected children, adolescents and adults. The investigation will have two phases: Phase One will examine the safety and efficacy of the bare metal stent, and will collect information about the covered stent when used as rescue therapy for aortic injuries occurring during bare metal stent procedures.

The aims of the Phase One study are to assess the use of the CP bare metal stent to:

  1. provide a reduction equivalent to surgery in arm-leg systolic cuff blood pressure gradient 12 months after dilation and stent implantation, in comparison to the pre-dilation gradient;
  2. accomplish gradient relief with a shorter number of days in hospital than surgery;
  3. accomplish gradient relief with a rate of occurrence of serious procedure-related adverse events occurring within 30 days of dilation that is equivalent to surgery; and
  4. accomplish gradient relief with a rate of occurrence of post-procedural paradoxical hypertension that is lower than surgery.
02

Conditions studied

  • Coarctation of the Aorta

Keywords

  • Aortic Coarctation
  • Heart Defects, Congenital
  • Stents
  • Heart Catheterization
03

In context

Aortic Coarctation

49 studies on the registry are indexed under Aortic Coarctation; 16 are open to participants now.

This study's enrollment of 105 is above the median of 45 across 19 interventional studies indexed under Aortic Coarctation.

Browse Aortic Coarctation studies →

Lead sponsor

This is the only study on the registry with Richard E. Ringel as lead sponsor.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
8 Years to 60 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Native or recurrent aortic coarctation
  • Weight greater than or equal to 35 kg
  • Noninvasive, arm-leg cuff systolic blood pressure difference or catheter measured systolic coarctation gradient greater than or equal to 20 mmHg

Exclusion criteria

Exclusion Criteria:

  • Age > 60 years
  • Connective tissue disorders, including Marfan syndrome and other genetic syndromes such as Turner syndrome and Noonan syndrome
  • Inflammatory aortitis
  • Bloodstream infection, including endocarditis
  • Pregnancy
  • Aortic aneurysm
  • Prior stent placement
  • Adults lacking capacity to consent
  • Foster children and/or wards of the court
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
105 participants (actual)

Study arms

  • Experimental
    Stent therapy of aortic coarctation

    Stenting of aortic coarctation

    Device: Stent therapy of aortic coarctation

Interventions

  • DeviceStent therapy of aortic coarctation

    Transcatheter delivery of a metallic stent to enlarge region of aortic narrowing caused by the coarctation.

    Also known as: Cheatham-Platinum Stent

06

What researchers measure

Primary outcomes

  1. Change in Difference Between Arm and Leg Systolic Blood Pressure From Baseline to 12 Months

    Noninvasive systolic blood pressures are measured in the arms and legs at baseline and 12 month follow-up. The difference between these measurements are calculated. The difference between systolic arm and leg blood pressures decreased by 30 ± 22 mmHg (n=90)

    Time frame: 12 months

Secondary outcomes

  1. Percentage of Participants With a Systolic Blood Pressure Greater Than the 95th Percentile for Age and Gender 12 Months Post Stent Placement

    Noninvasive Blood pressure is assessed at baseline and 12 months. The number of patients with a Systolic Blood Pressure \> 95th Percentile for Age and Gender is recorded at Baseline (n=105) and compared to 12 month follow up (n=92).

    Time frame: Baseline and 12 months

  2. Systolic Blood Pressure, Difference Between Upper and Lower Extremities

    Measurement of difference between upper and lower extremities by noninvasive, automated measurement of four quadrant Systolic Blood Pressure. Comparison between baseline and 12 month follow up.

    Time frame: Baseline and 12 months

07

Results

Posted Sep 25, 2014

Participant flow

Recruitment opened February, 2008 and ended December, 2010

Participant flow — Overall Study
MilestoneCoarctation Stenting
Started105
Completed85
Not completed20

Outcome measures

PrimaryChange in Difference Between Arm and Leg Systolic Blood Pressure From Baseline to 12 Months

Noninvasive systolic blood pressures are measured in the arms and legs at baseline and 12 month follow-up. The difference between these measurements are calculated. The difference between systolic arm and leg blood pressures decreased by 30 ± 22 mmHg (n=90)

Time frame:
12 months
Reported as:
Mean · mmHg
Change in Difference Between Arm and Leg Systolic Blood Pressure From Baseline to 12 Months
mmHgCoarctation Stenting
Change in Difference Between Arm and Leg Systolic Blood Pressure From Baseline to 12 Months30 ± 22
SecondaryPercentage of Participants With a Systolic Blood Pressure Greater Than the 95th Percentile for Age and Gender 12 Months Post Stent Placement

Noninvasive Blood pressure is assessed at baseline and 12 months. The number of patients with a Systolic Blood Pressure \> 95th Percentile for Age and Gender is recorded at Baseline (n=105) and compared to 12 month follow up (n=92).

Time frame:
Baseline and 12 months
Reported as:
Number · percentage of participants
Percentage of Participants With a Systolic Blood Pressure Greater Than the 95th Percentile for Age and Gender 12 Months Post Stent Placement
percentage of participantsCoarctation Stenting
Baseline61
12 month follow up17
SecondarySystolic Blood Pressure, Difference Between Upper and Lower Extremities

Measurement of difference between upper and lower extremities by noninvasive, automated measurement of four quadrant Systolic Blood Pressure. Comparison between baseline and 12 month follow up.

Time frame:
Baseline and 12 months
Reported as:
Mean · mmHg
Systolic Blood Pressure, Difference Between Upper and Lower Extremities
mmHgCoarctation Stenting
Baseline29 ± 17
12 months-1 ± 15

Adverse events

Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Coarctation Stenting—1/105 (1%)14/105 (13.3%)
Most frequent serious events
Most frequent serious events
EventCoarctation Stenting
Abnormal exercise echo test at one yearCardiac disorders1/105
Most frequent other events
Most frequent other events
EventCoarctation Stenting
Aortic AneurysmCardiac disorders5/105
Localized vascular tearVascular disorders2/105
Post-procedure hypertensionCardiac disorders2/105
Residual aortic obstructionCardiac disorders2/105
Stent MalpositionCardiac disorders1/105
AV FistulaCardiac disorders1/105
Groin HematomaVascular disorders1/105

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Coarctation Stenting
<=18 years67
Between 18 and 65 years38
>=65 years0
Age, Continuous
Age, Continuous(years)Coarctation Stenting
Median16 (8 to 52)
Sex: Female, Male
Sex: Female, Male(Participants)Coarctation Stenting
Female32
Male73
Region of Enrollment
Region of Enrollment(participants)Coarctation Stenting
United States105
08

Study locations

1 site
  • Children's Hospital Boston
    Boston, Massachusetts 02115, United States
09

References and documents

Publications

  • Holzer RJ, Gauvreau K, McEnaney K, Watanabe H, Ringel R. Long-Term Outcomes of the Coarctation of the Aorta Stent Trials. Circ Cardiovasc Interv. 2021 Jun;14(6):e010308. doi: 10.1161/CIRCINTERVENTIONS.120.010308. Epub 2021 May 27. PubMed 34039015 ↗
  • Meadows J, Minahan M, McElhinney DB, McEnaney K, Ringel R; COAST Investigators*. Intermediate Outcomes in the Prospective, Multicenter Coarctation of the Aorta Stent Trial (COAST). Circulation. 2015 May 12;131(19):1656-64. doi: 10.1161/CIRCULATIONAHA.114.013937. Epub 2015 Apr 13. PubMed 25869198 ↗

Individual participant data

Plan to share: No — Individual patient data is confidential and is not shared.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 11, 2016, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT00552812
Lead sponsor
Richard E. Ringel
Responsible party
Richard E. Ringel (MD, Johns Hopkins University) — Sponsor-investigator
First posted
Nov 2, 2007
Start date
Oct 2007
Primary completion
Dec 2012
Completion
Jul 2015
Results posted
Sep 25, 2014
Last update
Mar 11, 2016

Study contacts

Richard E Ringel, MD
principal investigator · Johns Hopkins University
Kathy Jenkins, MD
principal investigator · Harvard University

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2016. You cannot join it, but the record below documents what was studied.

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