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Atrial fibrillation (AF) is the most common arrhythmia in adults; it affects approximately 0.8 million patients in Japan alone. Yet despite many years of basic and clinical research, the exact mechanisms underlying the initiation and maintenance of AF remain poorly understood. In this review article, we summarize recent high-resolution optical mapping studies in isolated sheep hearts, which have provided...
The dynamics of ventricular fibrillation (VF) in the presence of heart failure (HF) are different from those in the normal heart. This has been attributed solely to HF-induced electrophysiologic remodelling. We hypothesized that acute stretch and ischaemia, which are normally present during VF, might contribute significantly to the altered VF dynamics in HF.HF was induced in eight sheep by rapid ventricular...
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