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Atrial remodelling and the risk of arrhythmias in endurance athletes

In the ProAFHeart study we aim to assess the association between atrial fibrillation (AF) and intense endurance exercise. Atrial Fibrillation is the most common sustained arrhythmia and amongst the established risk factors of age, hypertension and diabetes, exercise is increasingly recognised as a powerful modulator of AF risk.

Low and moderate intensity exercise is an important therapy in the prevention and treatment of AF but on the other end we notice that intense endurance exercise promotes AF. The mechanism for this are still to be understood.

This study will be the largest study of its kind and will enable us to clarify the effects that endurance exercise has on changes in heart function and structure, in particular atrial remodelling and how this affects the prevalence of AF.

This study is being conducted by the Baker Institute's Sports Cardiology laboratory.

Enquire about participating in this trial

Who can participate?

We are recruiting people in the following categories.

Young elite athletes:

  • Aged 16–23.
  • Competing in endurance based activities (triathlon, cycling, rowing, canoeing, distance running swimming at state or national level).
  • Planning to continue endurance sport competition for at least the next 5 years.

Retiring elite athletes:

  • Aged 28–45.
  • Within 12 months of retirement from elite competition in an endurance based activity at state or national level.

Retired elite athletes:

  • Aged 45–80.
  • Have retired after 10 years competition in rowing at national or international level.

Retiring elite athletes:

  • Aged 16–75.
  • have:
    • AF or atrial flutter; or
    • ventricular arrhythmia; or
    • a resting HR < 35 bpm; or
    • an abnormal cardiac function.

What is involved?

This study involves baseline testing and a repeat test in 2 years.

Testing will be scheduled over 2 days and involve a maximum of 5 hours.

The tests we will be conducting are:

  • Cardiac Magnetic Resonance imaging (CMR)
  • heart ultrasound
  • VO2max
  • DEXA scan
  • 24h Holter monitor
  • blood samples, height, weight

Retired athletes will undergo a repeat electrocardiogram and 7-day Holter monitor every 6 months for 2 years in addition to the baseline testing.

If you are interested and would like further information please contact:

Kristel Janssens
T:
+61 3 8532 1169
E: kristel.janssens@baker.edu.au

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With the rising number of Australians affected by diabetes, heart disease and stroke, the need for research is more critical than ever.

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