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Respiratory Sinus Arrhythmia and PACs

…couplets, in triplets or in foursomes. Four or more PACs in a row are described as a premature atrial tachycardia (PAT) or a supraventicular tach (SVT), as the beats are initiated from “above” the ventricles. A paroxysmal PAT or PSVT means that the burst of early beats was abrupt in onset, as well…

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