Study of the murmur produced by acute pulmonary artery constriction.
نویسندگان
چکیده
• Pulmonary artery constriction has been utilized as an experimental method of stressing the right ventricle" or producing changes in the systemic circulation." As a result, the basic circulatory features of pulmonary artery constriction have been documented. The murmur that is produced by this procedure has not received as much attention. It therefore seemed desirable to investigate this aspect of pulmonary artery constriction. The purpose of this report is to summarize these observations.
منابع مشابه
Bronchial Circulation in Severe Multiple Peripheral Pulmonary Artery Stenosis; Case Report Illustrating the Origin of Continuous Murmur.
PERIPHERAL pulmonary artery stenosis is being recognized with increasing frequency.1-3 Several observers4-6 have stressed the presence of a continuous murmur as a diagnostic feature, and continuous murmurs have been experimentally produced by graded constriction of a large branch of the pulmonary artery in dogs.5 This is the case report of an infant with severe multiple peripheral pulmonary art...
متن کاملNoscapine antagonizes vasoconstrictor action of bradykinin in isolated human umbilical artery
Abstract Background: It has been demonstrated that noscapine, an antitussive opioid alkaloid, could antagonize bradykinin- induced responses such as bradykinin effects in guinea-pig ileum, cough induced by bradykinin receptor agonist and angiotensin converting enzyme inhibitors, and brain damage after brain edema both in neonatal rat model and in patients with stroke. In the present study, the...
متن کاملEffects of acute and chronic digoxin administration in dogs with right-sided congestive heart failure produced by pulmonary artery constriction.
Acute and chronic responses to digoxin have been studied in dogs with cardiac failure secondary to constriction of the pulmonary artery. Cardiovascular and renal hemoclynamic function improved and, frequently, a striking increase in sodium (Na) excretion resulted. The data suggest a direct myocardial action of digoxin and provide evidence of impaired myocardial function similar to that observed...
متن کاملEffects of acute hemodynamic alterations on pulmonic valve motion. Experimental and clinical echocardiographic studies.
The purpose of this study was to assess the effects of acute alterations of the pulmonary circulation on the pulmonic valve echocardiogram. We measured the pulmonic valve opening velocity (PVOV) and right-sided systolic time intervals (right ventricular preejection period-to-right ventricular ejection time ratio [RPEP/RVET] in 22 open-chest dogs subjected to acute hemodynamic alterations produc...
متن کاملRupture of chorda tendineae of the tricuspid valve in a horse: a case report
A2-year-old cachectic cross-breed gelding was admitted toVeterinary Teaching Hospital of University of Tehran followingthe onset of a marked respiratory distress, coughing and ventraledema. Clinical examinations indicated harsh respiratory andexpiratory sounds as well as jugular vein distention. Therespiratory and heart rates were 35/min and 60 bpm, respectively.Agrade III/IV pansystolic murmur...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Circulation research
دوره 10 شماره
صفحات -
تاریخ انتشار 1962