under contract means there is an offer on it already and the buyer and seller are negotiating back and forth to come to an agreement. if ya need any more help just e-mail me. Lori lspalletta Â· 1 decade ago
Premature atrial complexes are caused by abnormal electrical impulses transmitted by the atria (either of the upper chambers of the heart). The abnormal electrical impulses cause contractions of the upper chamber of the heart earlier than expected. Such premature beats are generally harmless. slide 1 of 7.
Anaphase-promoting complex, a ubiquitin ligase cell cycle protein. Atrial premature complexes, a type of premature heart beat or irregular heart beat or arrhythmia which start in the upper two chambers of the heart. APC tablet, analgesic compound of aspirin, phenacetin, and caffeine. APC Superfamily, a superfamily of transport proteins.