BETA BLOCKERS By N., Pam M.S. - April 7, 2013 Drugs thay act as antagonists at the beta adnrenoceptors and reduce catecholamine mediated neurotransmission. Main effect is to slow heart rate and constrict smooth muscle in vasculature and the brochial tremmsystem. BETA BLOCKERS: "Joe's beta blockers were to slow his heart rate down." Related Psychology Terms BETA BLOCKERS PHENTOLAMINE MODAFINIL CARDIOMYOPATHY BETA ADRENORECEPTOR ATROPINE RESPIRATORY SINUS ARRHYTHMIA (RSA) CALCIUM-CHANNEL BLOCKCRS STAIRCASE PHENOMENON SLOW MUSCLE FIBER Cite this page: N., Pam M.S., "BETA BLOCKERS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/beta-blockers-2/ (accessed November 28, 2020).