ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

For detection and diagnosis of pheochromocytoma the method of urine analysis is considered the most convenient, safe, and accurate. Analysis of blood samples obtained by catheterization at different levels in the vena cava aids in localization. Some features of the clinical symptomatology and the pharmacologic and operative treatment of patients with chromaffin-cell tumors are given.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

In the experimental animal the basic and controversial problem was studied of the influence of cardiac contraction on coronary blood flow. Normally beating hearts were perfused at a constant pressure, and coronary inflow and outflow were determined. In order to assess the role of systole, prolonged periods of ventricular asystole and fibrillation were induced and observations were made of the changes in coronary flow. With the cessation of cardiac contraction blood flow in the coronary arteries and coronary sinus rose appreciably. The results of these studies support the concept that contraction of the heart muscle, by compression of the myocardial vascular bed, behaves as a throttling mechanism and impedes coronary flow. The method employed permits a separation and quantitation of the effects on coronary flow resulting from cardiac contraction and the vasomotor state of the coronary vessels.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

Sympathectomy and thrombo-endarterectomy have been largely unsatisfactory in the treatment of patients with arterial insufficiency of the lower extremities. In this paper the results are analyzed of a large experience with the use of lyophilized arterial homografts to bridge occlusive lesions below the aortic bifurcation. The criteria for selection of patients for operation, the simplified procedure of end-to-side by-pass of the obstruction, and the excellent results in 145 operations are presented.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

Twenty-five patients sustained an average weight loss of 21.7 pounds on a diet in which 73 per cent of total calories consisted of animal fat. Their "new" weight was maintained on this high-fat diet and subsequently on a low-fat diet. Standard Sf0-12 lipoproteins were highly influenced by dietary fat intake independent of weight change. In contrast the Sf20-400 fraction was lowered by negative caloric balance and weight reduction despite the ingestion of large amounts of animal fat. These changes were statistically highly significant. Divergent responses of different classes of beta-lipoproteins may be missed if only total beta-lipoprotein measurements are made.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

A brief historical review of primary pulmonary arteriosclerosis and hypertension has been given. Ten additional cases with detailed laboratory, roentgenographic, electrocardiographic, cardiac catheterization, and angiocardiographic studies are presented. The findings on 4 necropsied cases are also included. Progressive exertional shortness of breath, syncope, left chest pain, right ventricular hypertrophy, and pulmonary arterial dilatation, combined with high right ventricular and pulmonary arterial pressure and normal pulmonary capillary pressure in the absence of pulmonary disease, should be extremely suggestive of primary pulmonary hypertension. An unrelenting downhill course of right ventricular failure is usually seen.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

A method is presented for analyzing the probable effectiveness of blocking drugs in relieving vasospasm in the extremities, and comparison is given of the relative potency and side effects of 4 adrenergic blocking drugs and of their effects on heart rate, arterial pressure, and cardiac output, as estimated from a "circulatory index." Data are also given on the use of these drugs in evaluation of the circulation in patients.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

The authors present a test of myocardial function based on the continuous registration of pulmonary exchange of oxygen and carbon dioxide during rest and a standard amount of work. The authors believe that the test is simple enough for wide clinical application. The "functiocardiogram" is of considerable physiologic and clinical interest. The normal values of the test are defined and afew examples of abnormal tests are discussed.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

摘要:

Pathologic alterations of alveolar walls in 95 autopsied patients with mitral stenosis were not frequent. The most frequently encountered change was capillary dilatation, and in 83 per cent of the patients, even this change was slight or absent. Other alterations were focal and involved only small proportions of the area of tissue examined. A generalized increase in the thickness of basement membranes could not be demonstrated.

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID

ISSN:0009-7322    

出版商:OVID    

年代:1957

数据来源: OVID