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- W2923437219 abstract "Cardiac excitation-contraction coupling can be different between regions of the heart. Little is known at the atria level, specifically in different regions of the left atrium. This is important given the role of cardiac myocytes from the pulmonary vein sleeves, which are responsible for ectopic activity during atrial fibrillation. In this study, we present a new method to isolate atrial cardiac myocytes from four different regions of the left atrium of a large animal model, sheep, highly relevant to humans. Using collagenase/protease we obtained calcium-tolerant atrial cardiac myocytes from the epicardium, endocardium, free wall and pulmonary vein regions. Calcium transients were slower (time to peak and time to decay) in free wall and pulmonary vein myocytes compared to the epicardium and endocardium. This is associated with lower t-tubule density. Overall, these results suggest regional differences in calcium transient and t-tubule density across left atria, which may play a major role in the genesis of atrial fibrillation." @default.
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- W2923437219 date "2023-01-25" @default.
- W2923437219 modified "2023-10-15" @default.
- W2923437219 title "Regional Differences in Ca2+ Signaling and Transverse-Tubules across Left Atrium from Adult Sheep" @default.
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- W2923437219 doi "https://doi.org/10.3390/ijms24032347" @default.
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