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Tachycardia-induced cardiomyopathy (TIC) is a well-established cause of impaired left-ventricular function and heart failure. Fortunately, eliminating the tachycardia leads to rapid improvement in LV function. To examine long-term outcomes in these patients, researchers retrospectively studied records from 24 people (mean age, 46) who had been diagnosed with TIC and whose LV function and symptoms had improved after treatment with heart-rate or -rhythm control (and, in some cases, catheter ablation).
The cause of TIC was atrial fibrillation in 13 patients, atrial flutter in 4, and other arrhythmias in 7. The responsible arrhythmia had persisted for a median of 4.2 years before recognition of heart-failure symptoms and impaired LV function.
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