ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

摘要:

Tristani FE, Cohn JN: Studies in clinical shock and hypotension VII. Renal hemodynamics before and during treatment. Circulation 42: 839, 1970. On page 846, the first phrase (mg/min) should be &mgr;g/min.

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

摘要:

His bundle recordings during spontaneous and induced episodes of paroxysmal supraventricular tachycardia (SVT) demonstrated that the site of reentry responsible for this arrhythmia was in the A-V node. In five patients studied, A-V conduction time and refractory periods were normal, but atrial premature depolarizations (APD) within a portion of the relative refractory period of the A-V node consistently produced atrial reentry—echoes or sustained SVT. In two patients, APDs falling within the A-V effective refractory period failed to excite the His bundle but still reentered within the A-V node and began SVT. It was noted that the various relationships between atrial and ventricular depolarizations on the surface ECG did not reflect different mechanisms for SVT, but only variations in A-V nodal conduction time.

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

摘要:

Reported is a case in which the clinical findings of the scimitar syndrome were present but with termination of the anomalous pulmonary vein into the left atrium. There was hypoplasia of the right lung, dextroposition of the heart, and the scimitar sign in the right lower lung field. Cardiac catheterization revealed no shunt, and on pulmonary angiograms, a large common right pulmonary vein curved toward the diaphragm (as in the usual case of the scimitar syndrome), but then reversed course to enter the left atrium. No connection with the inferior vena cava was present.

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

摘要:

This paper is based upon an analysis of data from a prospective epidemiological study in which a large number of men and women were traced for six years after they answered a detailed questionnaire. The subjects were divided into seven groups according to the longevity of their parents and grandparents. Death rates from coronary heart disease, hypertensive heart disease, and stroke were found to be considerably higher among subjects with short-lived parents than among subjects with long-lived parents. This was found to be the case for coronary heart disease among men without a history of high blood pressure or diabetes, who were not seriously overweight, who took some exersise, and who never smoked cigarettes regularly.

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

摘要:

The response of the left ventricle to a level of supine bicycle exercise that induced angina, and the effects of ouabain (0.01 mg/kg) on this response were evaluated in 14 patients with coronary arterial disease. Before administration of ouabain, exercise was associated with depressed pumping performance of the left ventricle in four patients: stroke work fell with exercise while left ventricular end-diastolic pressure (LVEDP) increased. In five patients left ventricular (LV) performance was not frankly depressed, but nevertheless was abnormal: stroke work increased, but was accompanied by an inordinately large rise in LVEDP. In the remaining five patients LV function was essentially normal. Ouabain improved LV performance at rest in only a minority of patients, but during the stress of exercise, LV hemodynamics were improved by ouabain in 12 of the 14 patients. Five patients, however, continued to show either depressed or abnormal function with exercise after they were given ouabain. As judged by the relationship of LVEDP to LV peak dp/dt, left ventricular contractility was increased by ouabain in most patients both at rest and during exercise. Despite its beneficial effects on left ventricular performance, ouabain did not consistently alter either exercise tolerance or the LV tension-time index and pressure-rate product at which angina occurred.

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID

摘要:

Twenty-one men with coronary heart disease had supine phonocardiograms and carotid pulse tracings at rest, immediately after upright bicycle exercise, and 3 min after exercise 1 day preceding left ventricular cineangiography. External isovolumic contraction times (EICT) and left ventricular ejection time/EICT (LVET/EICT) ratios were computed and correlated with ejection fractions and ventricular end-diastolic volumes determined from right anterior oblique cineangiograms. For the ejection fraction, the highest correlations were with the LVET/EICT ratios immediately after (r = 0.71) and 3 min after exercise (r = 0.69). For the end-diastolic volume, the highest correlations were with the LVET/EICT ratios immediately after (r = −0.79) and 3 min after exercise (r = −0.80). The LVET/EICT ratio immediately after exercise differentiated between 13 patients with an ejection fraction of 50% or greater and eight patients with an ejection fraction <50%. These data indicate that the LVET/EICT ratio after exercise is a good noninvasive measurement for assessment of myocardial contractility.

ISSN:0009-7322    

出版商:OVID    

年代:1971

数据来源: OVID