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Atrial contractionAtrial contraction refers to the part of the heart cycle when the atrium (or upper, low-pressure chamber) squeezes or contracts forcing blood into the ventricle (the main pumping chamber).
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Atrial contractionA type of Cardiac Arrhythmia with premature atrial contractions or beats caused by signals originating from ectopic atrial sites. The ectopic signals may or may not conduct to the Heart Ventricles. At [..]
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