Clinical Manifestations

The LQTS is caused by a genetically determined abnormality of cardiac excitability. As a result, the affected patients have prolonged repolarization (QT interval at the surface electrocardiogram), abnormal T-wave morphology, and life-threatening cardiac arrhythmias, often with the typical pattern of ''torsades des pointes''[2] (Fig. 1). Syncope and a high risk of sudden death are the main features. The mean age of onset of symptoms is 12 years and earlier onset of symptoms is usually associated with a more severe form of the disease. Cardiac events are often precipitated by physical or emotional stress even if in a smaller subset of individuals, cardiac events occur at rest.[2]

Getting Started With Dumbbells

Getting Started With Dumbbells

The use of dumbbells gives you a much more comprehensive strengthening effect because the workout engages your stabilizer muscles, in addition to the muscle you may be pin-pointing. Without all of the belts and artificial stabilizers of a machine, you also engage your core muscles, which are your body's natural stabilizers.

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