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Each side has a small collecting chamber (atrium), which leads into a large pumping chamber (ventricle).

Your heart has a right side and a left side, separated by a wall. Immediately call triple zero (000) and ask for an ambulance if you feel any of these warning signs : pain or discomfort (pressure, heaviness or tightness) in your chest, neck, jaw, arms, back or shoulders, or if you feel nauseous, a cold sweat, dizzy or short of breath, lasting for more than 10 minutes. Untreated, they can affect your heart’s pumping action, which can lead to dizzy spells, shortness of breath, faintness, loss of consciousness or serious heart problems. Other arrhythmias are more serious, even life threatening. Some may cause your heart to skip or add a beat now and again, but have no effect on your general health or ability to lead a normal life. Changes in your heart’s electrical system can cause abnormal heart rhythms called ‘arrhythmias’.Īrrhythmias are a disturbed rhythm of your heartbeat. Sometimes, your heart’s electrical system may not work properly because of cardiovascular disease, chemicals in your blood (including some medicines) or sometimes for no known reason. Normally, this pumping (your heartbeat) is controlled by your heart’s electrical system. The blood pumped by your heart provides your body with the oxygen and nutrients it needs to function. It’s a muscle that pumps blood to all parts of your body.