Results 171 to 180 of about 2,560 (213)
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The American Journal of Cardiology, 1959
Abstract The general laws of auscultation and the basic principles and scope of phonocardiography are analyzed and discussed with particular reference to instrumentation. The characteristics and responses of the various types of transducers (microphones), equalizer or filter circuits, amplifiers, and recording oscillographs are presented; they must ...
Aldo A. Luisada +2 more
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Abstract The general laws of auscultation and the basic principles and scope of phonocardiography are analyzed and discussed with particular reference to instrumentation. The characteristics and responses of the various types of transducers (microphones), equalizer or filter circuits, amplifiers, and recording oscillographs are presented; they must ...
Aldo A. Luisada +2 more
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High frequency phonocardiography
The American Journal of Cardiology, 1961Abstract A systematic study of the high frequency components of the heart sounds and murmurs was made by means of a new standardized and calibrated phonocardiograph provided with a variable band pass filter. The frequency bands 500–1000 c.p.s. and higher were particularly studied but comparison was also made with the vibrations found in lower bands.
Aldo A. Luisada, Giuliano di Bartolo
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Phonocardiography and pulse tracings
International Journal of Cardiology, 1983The use of phonocardiography and pulse tracings has declined in recent years, no doubt in part due to the impact of newer, more sophisticated cardiac diagnostic methods. These time-honored techniques, however, still have a great deal to offer besides merely confirming auscultatory signs or serving as a teaching tool.
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Diseases of the Chest, 1969
The data of a clinical case of ventricular aneurysm are reported. While auscultation failed to reveal unusual murmurs, phonocardiography revealed bizarre diastolic murmurs and more conventional systolic murmurs. Discussion of these murmurs follows.
Aldo A. Luisada, B. Argano
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The data of a clinical case of ventricular aneurysm are reported. While auscultation failed to reveal unusual murmurs, phonocardiography revealed bizarre diastolic murmurs and more conventional systolic murmurs. Discussion of these murmurs follows.
Aldo A. Luisada, B. Argano
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Should Phonocardiography Be Abandoned?
JAMA: The Journal of the American Medical Association, 1979IN JUNE 1977, the Blue Shield Association announced that Blue Shield plans would discontinue routine payment for several diagnostic procedures because they were considered generally unnecessary. Phonocardiography was listed among those procedures, along with pulse tracings and apex cardiograms.
James J. Leonard +8 more
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The expanding horizon of phonocardiography
Archiv für Kreislaufforschung, 1960(1) Phonocardiography is defined and the various bands of the vibratory spectrum are described, both from a physical standpoint and in relation to clinical methods of observation. Methods employed by various authors for recording phonocardiograms are compared. A new calibrated phonocardiograph is described.
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Phonocardiography of the human fetus
American Heart Journal, 1926Abstract From our work evidence has been obtained of the variability of normal heart sounds before and after birth. An early systolic murmur is almost universal in early infancy, according to our criteria for the recognition of a murmur. Among thirty-three subjects upon whom fetal heart sound observations were made, twelve presented no murmurs ...
Wm.J. Kerr +2 more
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Standardization of phonocardiography
The American Journal of Cardiology, 1965Klaus Holldack +2 more
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Electro-Vecto-Phonocardiography.
Archives of Internal Medicine, 1967The 24 papers dedicated to Professor Duchosal came from many lands where his pupils now are active. Eight are Swiss, one both Swiss and Bostonian, three each from the USA and France, with Argentina, Belgium, Czechoslovakia, England, Germany, Holland, Italy, Mexico, and Portugal each represented by one report.
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