This week on sMater, we take a step back and begin to look at broader specialty areas at Mater's sites across the state, and begin by meeting James Cook University Senior Lecturer and Mater Cardiologist, Dr Soniah Bigie Moloi.  Dr Moloi shares his insights with host Glenn 'Minty' Mintern on atrial fibrillation, left atrial appendage closures, and the role ageing plays in the number of patients presenting with heart diseases. To learn more about Mater, visit mater.org.au.