ISSN:0098-6569    

DOI:10.1002/ccd.1810020202

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractThe HIS bundle electrogram has led to the aquisition of additional information on the physiology of the WPW syndrome and has become a useful technique for its diagnosis. The findings on the HBE and their interpretation in WPW are reviewed.

ISSN:0098-6569    

DOI:10.1002/ccd.1810020203

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractA combined angiocardiographic‐echocardiographic method for estimating right ventricular wall mass is described. Biplane cineangiocardiograms are analyzed for ventricular volume in end‐diastole, and wall thickness is determined from echocardiograms obtained with a high frequency transducer and strip chart recorder. The intracavitary and the external surface volumes of the ventricle are derived, and the difference multiplied by 1.050, the specific gravity of myocardium. Excellent correlation was observed between right ventricular wall mass and body surface area in normal children (r = 0.93). The mean right ventricular mass was 44.5 g/M2as compared to 78.1 g/M2for the left ventricle; corresponding mass/EDV values were 0.48 g/cm3and 1.26 g/cm3, respectively. In isolated right ventricular pressure overload, the increase in right ventricular mass is chiefly due to the increase in wall thickness; in volume overload, it is due mostly to the increase in chamber vol

ISSN:0098-6569    

DOI:10.1002/ccd.1810020204

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractA case of paradoxical embolism is presented in which the antemortem diagnosis was facilitated by a new simple angiographic technique that demonstrated a patent foramen ovale. An additional 14 patients were studied by this technique, and one had a patent foramen ovale. The mechanism of reversal of the normal intraatrial pressure gradient and subsequent right to left shunt through a patent foramen ovale is discussed. This angiographic technique may be readily applied in any diagnostic catheterization laboratory and complements existing methods for detecting patency of the foramen ovale in patients with suspected paradoxical embolism.

ISSN:0098-6569    

DOI:10.1002/ccd.1810020205

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractA comparison of lesions discovered by selective renal arteriograms with abnormalities observed on abdominal aortograms was made in 100 consecutive hypertensive patients. Twenty‐one lesions not seen on aortograms were found by selection. Eight patients with a normal aortogram had lesions. An abnormality was discovered in at least one study in 58 patients. The increased rate of lesion detection by selective studies outweighs the slight risk of complication

ISSN:0098-6569    

DOI:10.1002/ccd.1810020206

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractThe data from 88 patients (pts) with aortic stenosis (AS) were reviewed to determine relationships between angina pectoris (AP) and coronary artery disease (CAD). Results of surgery performed in 81 of these pts was analyzed. All pts had coronary arterlograms, and lesions ≥ 50% were considered significant. Fifty‐nine pts had an aortic valve gradient measured at catheterization ≥ 40 mmHg, and in 29 pts, AS was confirmed at operation.Sixty‐eight pts (77%) experienced AP, and 32 had coexisting CAD (47%); 9 of 20 pts without AP had CAD (45%). There were no significant differences in the incidence of AP in pts divided into subgroups by the aortic valve gradient (40–50, 51–100, 101–200 mmHg) or age (40–59, 60–81 years. Also, no significant differences were found in the incidence or extent of CAD between the two age groups; the extent of CAD was similar regardless of the presence or absence of AP. In pts with AP (1) CAD was more likely in pts ≥ 60 years of age; (2) CAD was less likely when the aortic valve gradient was>100 mmHg, suggesting that AP in these pts was due to hemodynamically severe AS. All pts with 3‐vessel CAD experienced AP, and the aortic valve gradient was less in these pts than in those with no CAD or less extensive CAD. In 19 pts with combined AS and CAD who had both the aortic valve replaced and a revascularization operation only 1 of pts died in the hospital, while 3 of 19 pts with combined AS and CAD who had aortic valve replacement alone died.In this study a significant number of pts with AS experienced AP, and the presence or absence of AP did not predict coexisting CAD. Coronary arteriography is recommended in the evaluation of pts ≥ 40 years of age with AS. The operative mortality appears to be decreased in pts with AS and CAD wh

ISSN:0098-6569    

DOI:10.1002/ccd.1810020207

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractThe slope of the regression equation for left ventricular ejection time (LVET) vs heart rate (HR) is the appropriate factor for correcting LVET for HR. Because the regression relationship varies under different conditions, we determined the LVET‐HR equations for subjects (1) seated at rest on a bicycle ergometer, and (2) during uninterrupted bicycle exercise. In 18 normally active male volunteers, ages 22 − 37, HR and LVET were measured under the two conditions and the regression relationship for LVET on HR determined for each. Regression equations are as follows: (1) LVET = 379 − 1.8 HR ± 11.0 for subjects seated at rest on a bicycle ergometer, and (2) LVET = 371 − 1.2 HR ± 13.9 for subjects performing upright bicycle exercise. The slope factors (1.8 and 1.2) differed significantly (p<0.01). The data indicate that considerable error can result from arbitrarily applying to exercising or resting subjects a correction factor which does not fit the conditions of the data to be

ISSN:0098-6569    

DOI:10.1002/ccd.1810020208

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

ISSN:0098-6569    

DOI:10.1002/ccd.1810020209

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractArtifactual pulmonary wedge pressure measurements were encountered during bedside use of Swan‐Ganz catheters. These values were higher than pulmonary artery end diastolic pressure and devoid of typical phasic contours. Utilizing fluoroscopy these artifacts were reproduced by advancing the catheter tip 2–4 cm beyond the site of initial wedging and reinflating the balloon. Spurious increases of pulmonary wedge pressure of up to 15 mm Hg were thus obtained.In vitro catheter testing demonstrated overlapping of the catheter tip by the deformed balloon when it was fully inflated in a channel too small to accomodate it.These measurement artifacts are thus attributed to distal migration of the catheter tip into relatively small pulmonary artery branches and to subsequent occlusion of the catheter lumen by the balloon when it is reinflated. This can readily be avoided by routinely inflating the balloon with the minimum volume of air sufficient to yield a pulmonary wedge pressure trac

ISSN:0098-6569    

DOI:10.1002/ccd.1810020210

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY

摘要:

AbstractA wedge has been designed and constructed to facilitate obtaining posteroanterior and oblique half‐axial projections routinely during coronary arteriographic examinations in a conventionally equipped catheterization laborator

ISSN:0098-6569    

DOI:10.1002/ccd.1810020211

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1976

数据来源: WILEY