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An arrhythmia is a change in the rhythm of your heartbeat. These occasional changes can be brought on by strong emotions or exercise. The walls of the heart contract to push blood through the chambers. The contractions are controlled by an electrical signal that begins in the heart's natural "pacemaker" (the SA node). The rate of the contractions is influenced by nerve impulses and hormones in the blood. Minor arrhythmias may be caused by excessive alcohol use, smoking, caffeine, stress or exercise.
Tests available
One test that may required for diagnosis is an electrocardiogram, also called ECG or EKG. You may need to take a treadmill test while your heart is monitored, or monitor your heart while you do your daily activities. This can be done with a Holter monitor for 24 hours. Some mild arrhythmias require no treatment.
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