Some effects of the /3-adrenergic receptor blocker, propranolol, were studied in 20 normal, fasting, conscious men. The measurements made included cardiac output, splanchnic blood flow and oxygen consumption, arterial and hepatic venous blood pressure, and heart rate. The intravenous administration of propranolol (0.13 mg/kg) was followed by significant reductions in splanchnic blood flow and o...

Antihypertensive drug treatment is capable of aggravating angina pectoris in hypertensive patients with coronary artery disease. The complication appears to be due to different hemodynamic mechanisms. Angina pectoris caused by hydralazine may result not only from a reduction in aortic perfusion pressure but also from increases in cardiac output and pulse rate which the drug produces. Coronary i...

SHIBATA, C., SASAKI, I., N rro, H., OHTANI, N., MATSUNO, S., MIzuMOTO, A., IWANAGA, Y. and ITOH, Z. Effects of Substance P on Gastric Motility Differ Depending on the Sites and Vagal Inneruation in Conscious Dogs. Tohoku J. Exp. Med., 1994, 174 (2),119-128 The effect of substance P on gastric motility was studied in conscious dogs by means of strain gauge force transducers chronically implanted...

THE INCREASING clinical use of hexamethonium, a ganglion blocking agent, makes desirable a detailed knowledge of its acute hemodynamic effects in normotensive man. Recent work on dogs' indicates that the hexamethonium-induced fall in arterial pressure is accompanied by significant decrease in cardiac output with increase in the calculated total peripheral resistance. Accordingly, the authors co...

Dextran in lactated Ringer's solution (20 ml/kg) was infused for 1 hour into anesthetized dogs with sinoaortic denervation and vagotomy (deafferentation; n = 10) and dogs treated with hexamethonium (de-efferentation; n = 13) to compare with our previous observation in dogs with an intact autonomic nervous system (control, n = 34). During the infusion, increase in blood pressure associated with ...

ONE of the few observations made in hypertension upon which there is almost universal agreement is the increased response of the blood pressure to pressor drugs. It is found in nearly all types of hypertension, both experimentally and clinical.>9 Nevertheless, the mechanisms responsible for it have not been adequately investigated. I have studied the vascular reactivity in rabbits, comparing th...

ONE of the few observations made in hypertension upon which there is almost universal agreement is the increased response of the blood pressure to pressor drugs. It is found in nearly all types of hypertension, both experimentally and clinical.>9 Nevertheless, the mechanisms responsible for it have not been adequately investigated. I have studied the vascular reactivity in rabbits, comparing th...

The sino-atrial node area was perfused selectively through the right atrial artery in 76 dogs. The relationship between changes in the blood pressure in this artery and sinus node rhythmicity was studied in 56 hearts in which the major blood supply to the sinus node artery came from the right atrial artery. A reciprocal relation was observed between changes of blood pressure in the sinus node a...

Some effects of the /3-adrenergic receptor blocker, propranolol, were studied in 20 normal, fasting, conscious men. The measurements made included cardiac output, splanchnic blood flow and oxygen consumption, arterial and hepatic venous blood pressure, and heart rate. The intravenous administration of propranolol (0.13 mg/kg) was followed by significant reductions in splanchnic blood flow and o...

During the course of treating 54 severely hypertensive patients with parenteral hexamethonium bromide, wehave observed the development of unexpected pulmonary dyspnea and associated radiographic changes in the lungs in three cases after 7, 9, and 12 months' therapy respectively. Two of these came to autopsy; the third has recovered. The object of this paper is to record the clinical, radiologic...