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Training-induced Increased Left Ventricular Trabeculation (MARATHON)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02568072
Recruitment Status : Completed
First Posted : October 5, 2015
Last Update Posted : September 11, 2017
St. Bartholomew's Hospital
Cardiac Risk in the Young
British Heart Foundation
Information provided by (Responsible Party):
St George's, University of London

Brief Summary:
This project will expand on research conducted by the investigators' group, where the investigators have demonstrated increased LV trabeculation, satisfying currently existing criteria for LV Non-Compaction Cardiomyopathy (LVNC), in groups exposed to high cardiac workloads. To the investigators' knowledge, this will be the first prospective study aiming to demonstrate a direct relationship between high levels of exercise and increased LV trabeculation. This study may add weight to the theory that this entity currently described as LVNC, is a morphological epiphenomenon common to many distinct myocardial remodeling processes associated with increased cardiac preload and afterload and may better define normal adaptive increases in LV trabeculation.

Condition or disease
Athletes Heart Left Ventricular Hypertrabeculation

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Study Type : Observational
Actual Enrollment : 120 participants
Observational Model: Cohort
Time Perspective: Prospective
Official Title: Increased Left Ventricular Trabeculation in Athletes - a Marker of Left Ventricular Non-compaction or a Physiological Epiphenomenon of Increased Cardiac Preload?
Study Start Date : October 2015
Actual Primary Completion Date : July 2016
Actual Study Completion Date : July 2016

Primary Outcome Measures :
  1. Thickness of non-compacted myocardial tissue (mm) [ Time Frame: 7 months ]
    Measured on echocardiography and cardiac MRI

  2. Thickness of compacted myocardial tissue (mm) [ Time Frame: 7 months ]
    Measured on echocardiography and cardiac MRI

  3. Myocardial fractal dimension [ Time Frame: 7 months ]
    Measured on cardiac MRI

Secondary Outcome Measures :
  1. Increase in peak VO2 on CPET during training [ Time Frame: 7 months ]

Other Outcome Measures:
  1. Change in NTproBNP levels [ Time Frame: 7 months ]

Biospecimen Retention:   Samples With DNA
Blood samples. Urine samples.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 35 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Healthy participants running first marathon event in Virgin London Marathon 2016.

Inclusion Criteria:

1. Asymptomatic and normotensive sedentary individuals (≤2 hours/week of physical activity) aged 18-35 years

Exclusion Criteria:

  1. Hypertension;
  2. Previous cardiac history;
  3. Symptoms suggestive of cardiac disease;
  4. Use of anabolic steroids;
  5. Use of performance enhancing drugs;
  6. Abnormal ECG (As defined by the proposed refined ECG screening criteria for black and white athletes published by the Investigators' group)
  7. Left ventricular hypertrophy >15 mm in males and >12 mm in females;
  8. Significant valvular heart disease or intra-cardiac shunt on echocardiography
  9. Individuals with contraindications to cardiac MRI scanning
  10. Pregnant or breastfeeding women.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02568072

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United Kingdom
Barts Heart Centre
London, United Kingdom, EC1A 7BE
Sponsors and Collaborators
St George's, University of London
St. Bartholomew's Hospital
Cardiac Risk in the Young
British Heart Foundation
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Principal Investigator: Sanjay Sharma, MD FRCP FESC St George's, University of London
Additional Information:
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Responsible Party: St George's, University of London Identifier: NCT02568072    
Other Study ID Numbers: 15.0035
FS/15/27/31465 ( Other Grant/Funding Number: British Heart Foundation )
First Posted: October 5, 2015    Key Record Dates
Last Update Posted: September 11, 2017
Last Verified: October 2016
Keywords provided by St George's, University of London:
cardiac remodelling
left ventricular non-compaction cardiomyopathy