SA Group of Specialists is committed to providing a high quality, comprehensive health service across a range of medical specialties. With approximately 40 practitioners working across 12 specialties, we can meet your medical needs.  Also incorporating Adelaide Obesity Surgery, we offer a multidisciplinary approach to weight loss management and a healthy lifestyle, and Adelaide Breath Testing based at the Tennyson Centre provides a simple take home  test for detection of fructose or lactose intolerance.

  • Obstructive Sleep Apnoea

    Obstructive Sleep Apnoea is associated with diabetes, hypertension, erectile dysfunction, glaucoma, and of course heart disease. One of the more exciting and new links is between Atrial Fibrillation (AF) and OSA.

    Both conditions are very common. AF is the most common cardiac arrhythmia in Australia, and OSA affects upto 24% of men and 9% of women. OSA combined with sleepiness (OSA Syndrome) occurs in 4% of men and 2% of women (1). Patients with AF and those with OSA share similar demographic features - they are more likely to be male, hypertensive, of an older age, and have a higher body mass index. However, this link is much more than statistical chance.

    Many studies have established that patients with severe OSA are significantly more likely to develop AF, increasing their risk by four times (2).OSA decreases the likelihood of successful cardioversion (from medications or electrically) and increases the risk of AF returning.The recurrence rate of AF after cardioversion can be as high as 82% (3). AF also recurs more often in those with OSA after radiofrequency catheter ablation (4).

    According to Sleep Disorders Physician Dr Dien Dang, this is unsurprising considering the severe degree of haemodynamic compromise that occurs with OSA. “OSA causes severe desaturations, cyclical hypoxaemia, and can structurally change your heart over time,” says Dr Dang, "Everyone who has ever had AF should consider a Sleep Study in a Hospital."

    • The OSA and AF population overlap considerably.

    • OSA can affect AF profoundly

    • Untreated OSA increases AF risk by 4x • Untreated OSA increases cardioversion failure by 4x

     If you have Atrial Fibrillation, call us now to consult one of our Sleep Specialists.


    1. Young et al. NEJM 1993

    2. The Sleep Heart Health Study. AJRCCM 2006 3. Kanagala et al. Circulation 2003 4. Naruse Y et al. Heart Rhythm. 2012