Premature atrial contractions (pacs) - cardiachealth, Premature atrial contractions (pacs) are amongst the most common forms of arrhythmias. it is due to the premature discharge of an electrical impulse in the atrium. Pubmed 14967891 - national center biotechnology, Moved permanently. the document has moved here.. Premature ventricular contractions (pvcs) - cardiac health, Introduction; causes; diagnosis; treatment; palpitations are feelings that your heart is skipping a beat, fluttering, or beating irregularly, too hard or too fast..
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