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CompletedNCT03469843Updated Mar 29, 2022

Characterization of the Cardiac Reinnervation of Patients With Transposition of the Great Arteries Long After Repair With the Arterial Switch Operation. Correlation With Electrocardiographic and Exercise Test Parameters

An observational study in Congenital Heart Disease, Congenital Heart Defect and Transposition of the Great Arteries, sponsored by Hospital Universitari Vall d'Hebron Research Institute. Completed at 1 site in Spain. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-03-29.

Sponsored by Hospital Universitari Vall d'Hebron Research Institute · Observational

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Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
25
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 18 studies in Heart Defects, Congenital with a site in Spain — 5 open to participants now, 6 under way, none of them phase 3. Heart Defects, Congenital · Spain.

Started
2018
with 1 other
Observational
9 of 18
4 open now
Registered
10th of 18
by date
Lead sponsor
4 of 18
Hospital Universitari Vall d'Hebron Research Institute

Among the 18 studies in Heart Defects, Congenital with a site in Spain, this one is one of 2 that started in 2018, is one of 9 observational ones, and was the 10th registered.

Heart Defects, Congenital

991 studies on the registry are indexed under Heart Defects, Congenital; 251 are open to participants now.

Browse Heart Defects, Congenital studies →

Open to participants now

5 of the 18 studies in Heart Defects, Congenital with a site in Spain are open now. Recruiting first, the newest first:

All 5 open studies →

A study can be open while its sites in Spain have not opened yet or have stopped. Only those recruiting at a site in Spain →

Who these studies take

Of the 154 Heart Defects, Congenital studies recruiting now, 67 (44%) set no upper age limit and 79 (51%) stop at 75 or younger; 110 take children under 18; 25 take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

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02

Study summary

Cardiac denervation is inherent to the arterial switch (ASO) technique for the repair of transposition of the great arteries (TGA) and the long term reinnervation process has not been studied. We sought to describe the reinnervation status of adult patients long after the ASO, to identify areas of myocardial perfusion/innervation mismatch and to assess the relation of innervation status and exercise capacity.

Read the detailed description

Cardiac denervation is inherent to the arterial switch (ASO) technique for the repair of transposition of the great arteries (TGA) and the long term reinnervation process has not been studied. We sought to describe the reinnervation status of adult patients long after the ASO, to identify areas of myocardial perfusion/innervation mismatch and to assess the relation of innervation status and exercise capacity.

03

Conditions studied

  • Congenital Heart Disease
  • Congenital Heart Defect
  • Transposition of the Great Arteries

Keywords

  • Congenital Heart Disease
  • Cardiac denervation
  • 123I-metaiodobenzylguanidine
  • Arterial switch operation
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Patients aged of more than 18 years-old with transposition of the great arteries repaired with the arterial switch

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

  • Patients with transposition of the great arteries repaired with the arterial switch.
  • Patients aged of more than 18 years-old.

Exclusion criteria

Exclusion Criteria:

  • Pregnancy or breast-feeding.
  • Denial of .
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
25 participants (actual)
Patient registry
No

Groups and cohorts

  • Patients

    patients with transposition of the great arteries long after repair with the arterial switch operation

    Other: Non intervention

Interventions

  • OtherNon intervention

    patients without intervention

    Also known as: patients without intervention

06

What researchers measure

Primary outcomes

  1. Myocardial innervation pattern on 123I-mlBG SPECT.

    To describe the myocardial reinnervation pattern of a cohort of patients with TGA long after ASO using cardiac nuclear imaging.

    Time frame: 1 day

Secondary outcomes

  1. Myocardial perfusion defects on cardiac nuclear imaging.

    To identify myocardial perfusion defects using cardiac nuclear imaging.

    Time frame: 1 day

  2. Myocardial innervation perfusion mismatch defects on cardiac nuclear imaging.

    To identify myocardial innervations/perfusion mismatch using cardiac nuclear imaging.

    Time frame: 1 day

  3. Treadmill exercise test.

    To determine exercise capacity (METs and double product) and chronotropic response (Maximal heart rate and heart rate increase pattern). Correlate with myocardial reinnervation pattern and sinus node reinnervation. To determine exercise induced ischeamic ST segment changes. Correlate with myocardial perfusion defects and innervation-perfusion mismatch.

    Time frame: 1 day

  4. 24 hours ECG Holter monitoring .

    To determine sinus node innervation through heart rate variability (HRV) which will be assessed by time domain variables (the standard deviation of normal RR intervals (SDNN) and the square root of the mean of the squared differences between adjacent normal RR intervals (r-MSSD)) and frequency domain variables (variance of all R-R intervals - total power (TP); power in the very low frequency range - very low frequency (VLF, 0.003-0.04 Hz); power in the low frequency range-low frequency (LF, 0.04-0.15Hz); low frequency power in normalized units-normalized low frequency; power in the high frequency range-high frequency (HF, 0.15-0.40 Hz); and high frequency power in normalized units-normalized high frequency and the ratio of low frequency to high frequency (LF/HF)).

    Time frame: 1 day

07

Study locations

1 site
  • Hospital Universitari Vall d'Hebron
    Barcelona, 08035, Spain
08

References and documents

Publications

  • Tobler D, Williams WG, Jegatheeswaran A, Van Arsdell GS, McCrindle BW, Greutmann M, Oechslin EN, Silversides CK. Cardiac outcomes in young adult survivors of the arterial switch operation for transposition of the great arteries. J Am Coll Cardiol. 2010 Jun 29;56(1):58-64. doi: 10.1016/j.jacc.2010.03.031. PubMed 20620718 ↗
  • Khairy P, Clair M, Fernandes SM, Blume ED, Powell AJ, Newburger JW, Landzberg MJ, Mayer JE Jr. Cardiovascular outcomes after the arterial switch operation for D-transposition of the great arteries. Circulation. 2013 Jan 22;127(3):331-9. doi: 10.1161/CIRCULATIONAHA.112.135046. Epub 2012 Dec 12. PubMed 23239839 ↗
  • Kondo C, Nakazawa M, Momma K, Kusakabe K. Sympathetic denervation and reinnervation after arterial switch operation for complete transposition. Circulation. 1998 Jun 23;97(24):2414-9. doi: 10.1161/01.cir.97.24.2414. PubMed 9641693 ↗
  • Grupper A, Gewirtz H, Kushwaha S. Reinnervation post-heart transplantation. Eur Heart J. 2018 May 21;39(20):1799-1806. doi: 10.1093/eurheartj/ehw604. PubMed 28087606 ↗

Individual participant data

Plan to share: No

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Apr 2018 to primary completion in Mar 2019, 10 months.

Of 178 non-industry observational studies under Heart Defects, Congenital, half reached primary completion within 42 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 83. This study's 10 months is below that.

Counting every sponsor, half of 185 studies reached it within 44 months; a quarter within 17 and three quarters within 83.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 20, 2018
First posted
Mar 19, 2018
StartActual
Apr 19, 2018
Primary completionActual
Mar 1, 2019
CompletionActual
Sep 1, 2019
Last update
Mar 29, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 29, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03469843
Responsible party
Sponsor
First posted
Mar 19, 2018
Start date
Apr 19, 2018
Primary completion
Mar 1, 2019
Completion
Sep 1, 2019
Last update
Mar 29, 2022

Study contacts

Laura Dos Subirà, PhD MD
principal investigator · Hospital Universitari Vall d'hebron Barcelona, Spain

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Mar 2022. You cannot join it, but the record below documents what was studied.

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