transient prolongation of the corrected q-t interval preceded spontaneous or ergonovine maleate-provoked coronary spasm in 11 patients with variant angina pectoris , whereas no significant change in the q-t interval followed ergonovine administration in 27 control patients with atypical chest pain who did not have coronary spasm .
C0002963
variant angina pectoris
C0014704
ergonovine