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.
Premature junctional complexes (PJCs) Premature junctional complexes (PJCs) are premature depolarizations from the AV node or the proximal portion of the His-Purkinje system (more common). PJCs most often occur in the absence of structural heart disease but may occur also in clinical settings similar to those surrounding PACs.