2.
A patient presents to the emergency department (ED) with a heart rate of 120 beats/minute ar
blood pressure of 80/50. The etiology of these signs and symptoms (S&S) are likely related to
a potassium level of 5.5 (normal = 3.5-5.0) caused hypopolarization of the cardiomyc
membrane.
b.
a potassium level of 5.5 (normal = 3.5 - 5.0) caused hyperpolarization of the cardiomy
cell membrane.
C. the activation of the "flight or fight" response and an increased release of acetylcholine
an increased afterload to the left ventricle from pulmonary artery vasoconstriction.
PP
d. an increased after load to the left ventricle from pulmonary artery vasoconstriction