Role and purposes:
Α-receptor antagonist drugs, by blocking alpha-receptor and beta-receptor indirectly excitement, the rapid expansion of the blood vessels around, can significantly reduce peripheral vascular resistance, increased peripheral blood volume, improve microcirculation. The goods are excited about the role of the heart to increase cardiac contractility, heart rate accelerated, cardiac output increase. Clinical mainly for the treatment of congestive lung or pulmonary edema acute heart failure, vascular spasm of the disease, with hand-foot-cyanosis, sentimental toxic shock and pheochromocytoma, and other diagnostic tests. Also for premature ventricular contractions.