ISSN:0098-6569    

DOI:10.1002/ccd.1810030202

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

年代:1977

数据来源: WILEY

ISSN:0098-6569    

DOI:10.1002/ccd.1810030203

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

年代:1977

数据来源: WILEY

摘要:

AbstractThe results of left ventricular endomyocardial biopsy by means of a long sheath technique in 154 patients are reported. The risks of left ventricular biopsy are those of left heart catheterisation. In 30 of these patients the results of left and right ventricular biopsy were compared, and in a further 10 patients the right ventricle only was biopsied. Biopsy from the left ventricle carries less risk of cardiac perforation, gives a higher incidence of successful biopsy, and with the exception of hypertrophic obstructive cardiomyopathy yields more diagnostic information.

ISSN:0098-6569    

DOI:10.1002/ccd.1810030204

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

年代:1977

数据来源: WILEY

摘要:

AbstractHistological sections of left ventricular endomyocardial biopsies have been examined by light microscopy. The biopsies were taken from patients with congestive, hypertrophic, or restrictive cardiomyopathy and from patients with either aortic stenosis or regurgitation. In congestive cardiomyopathy no specific features were found and similar abnormalities were seen in aortic valve disease. In only one of six cases of asymmetric septal hypertrophy were the characteristic histological appearances noted. In four out of five patients with a restrictive type of cardiomyopathy, amyloid was demonstrated. The muscle fibres in aortic stenosis had a greater cross‐sectional area than those in aortic regurgitation. A greater degree of fibrosis was present in aortic stenosis than in aortic regurgitation. In aortic stenosis the amount of fibrous tissue was inversely related to functio

ISSN:0098-6569    

DOI:10.1002/ccd.1810030205

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

年代:1977

数据来源: WILEY

摘要:

AbstractLeft ventricular endomyocardial biopsies have been obtained from patients with cardiomyopathy and hypertrophy due to aortic valve disease. These biopsies have been examined by electron microscopy and the ultrastructural abnormalities compared. In congestive cardiomyopathy no specific abnormalities were found although myofibrillary degeneration and membrane‐bound vacuoles were more commonly present. Crossing of whole groups of sarcomeres was found only in asymmetric septal hypertrophy, but was not present in all cases. Amyloid deposits were demonstrated easily by electron microscopy in patients with restrictive cardiomyopathy. In the patients with hypertrophy due to aortic valve disease, no specific features were found and ultrastructural abnormalities did not differentiate between normal and impaired left ventricular function

ISSN:0098-6569    

DOI:10.1002/ccd.1810030206

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

年代:1977

数据来源: WILEY

摘要:

AbstractJets emanating from the exit holes of cardiac catheters during angiographic injections are theoretically capable of producing severe localized cardiovascular trauma. We adopted a fluid mechanical model of an axially symmetric jet to define these energy forces quantitatively, especially as they would occur in the clinical setting. During angiographic injection at all catheter flow rates used clinically, the jet emanating from the exit hole was always turbulent. The physical characteristics of the turbulent jet penetration into the intravascular blood fell upon a universal curve independent of the jet Reynolds number. This curve, never previously described, allows ready calculation of hydraulic energy dissipation for any catheter of known length and lumen size. The diameter of the catheter exit orifice has a greater effect than injection flow rate on decreasing jet penetration. These results provide useful guidelines for reducing trauma during routine angiography.

ISSN:0098-6569    

DOI:10.1002/ccd.1810030207

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

年代:1977

数据来源: WILEY

摘要:

AbstractAlthough the concept of the left ventricle as pump has gradually evolved over the past 2000 years, the „modern era”︁ of our understanding began in the 1880's. Studies by Howell and Donaldson, using an isolated heart‐lung preparation, provided insight into the inter‐relationship between preload, afterload and contractility. These concepts were further advanced by Frank, Henderson and Starling, all using isolated heart preparations. The development of new techniques by Wiggers and Hill in the 1920's and 1930's opened up entirely new areas of investigation using intact animal preparations (Wiggers) and isolated muscle segments (Hill). Our debt to these investigators is enormous, and it is perhaps appropriate to reflect on their creative energies as we attempt to define more clearly the mechanical and biochemical functions of hea

ISSN:0098-6569    

DOI:10.1002/ccd.1810030208

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

年代:1977

数据来源: WILEY

摘要:

AbstractAn instance of knotting of a flow‐directed catheter about an intracardiac structure, presumably part of the tricuspid valve apparatus, is described. Because of the patient's severe pulmonary disease, cardiac surgery to remove the catheter was contraindicated. The central portion of the catheter was allowed to remain in situ, without apparent ill effects over a 16 month perio

ISSN:0098-6569    

DOI:10.1002/ccd.1810030209

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

年代:1977

数据来源: WILEY

摘要:

AbstractA simple inexpensive modification to permit x‐ray beam angulation of a cineradio‐graphic system consisting of a ceiling‐suspended image intensifier and an under‐the‐table x‐ray tube is described. This has permitted the incorporation of the half‐axial projection into the routine evaluation of the proximal left anterior descending artery (LAD) with a minimum of patie

ISSN:0098-6569    

DOI:10.1002/ccd.1810030210

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

年代:1977

数据来源: WILEY

摘要:

AbstractA simple procedure for making cardiac casts has been described. These casts aid in the understanding of the spacial relationships of the ventricles, valves and coronary arteries as they appear at the time of cardiac angiography.

ISSN:0098-6569    

DOI:10.1002/ccd.1810030211

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

年代:1977

数据来源: WILEY