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.
Note the following: 1  Hypothalamic tumors can produce space-occupying lesions that are frequently suprasellar. These tumors can cause abnormally low levels of circulating pituitary hormone by compression of the hypothalamus or pituitary stalk, essentially causing delayed puberty, anovulation, and amenorrhea.