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Adequate consideration of cardiac structure and function, prognostic implications and the use of other diagnosticmethods are essential to the proper evaluation and management of individuals suffering from ventricular arrythmia (VA). VAs are categorized as significant, prognostically important, of unknown importance or insignificant. Tests are performed on patients suspected of having VA to establish its frequency or existence, create a prognosis, assess the effectiveness of drug therapy or correlate the VA with symptoms. Among the most frequently used tests are exercise testing, ambulatory electrocardiographic monitoring and electrophysiologic testing.