Zobrazeno 1 - 10
of 15
pro vyhledávání: '"F. Lowell Dunn"'
Autor:
Walter E. Rahm, F. Lowell Dunn
Publikováno v:
American Heart Journal. 44:95-105
1. 1. The method involves direct conversion of the cardiac forces at the precordium into electrical impulses, followed by amplification and conversion to light deflections by electrostatic means. 2. 2. Calibration is in absolute units, and conditions
Autor:
F. Lowell Dunn, Walter E. Rahm
Publikováno v:
American Heart Journal. 46:237-244
Autor:
F. Lowell Dunn
Publikováno v:
Journal of Infectious Diseases. 40:383-388
Publikováno v:
Circulation Research. 1:518-522
A procedure using frequency modulation is described for transmission of electrocardiograms and electroencephalograms over available local and long distance telephone facilities.
Autor:
F. Lowell Dunn
Publikováno v:
Review of Scientific Instruments. 2:807-809
Autor:
William J. Dickerson, F. Lowell Dunn
Publikováno v:
Circulation research. 3(1)
The disappearance of a third heart sound in a case of calcific pericarditis after surgery together with a quantitative study of the time and frequency relations of the third heart sound in 70 cases suggests that the tensing of the pericardium is a fa
Autor:
Walter E. Rahm, F. Lowell Dunn
Publikováno v:
Annals of internal medicine. 32(4)
Excerpt Thomas Lewis in the introduction to his "Mechanism and Graphic Registration of the Heart Beat" emphasized that scientific advancement depends upon the development of suitable instrumentatio...
Autor:
F. Lowell Dunn
Publikováno v:
Science (New York, N.Y.). 64(1670)
Autor:
Donald C. Bohlsen, F. Lowell Dunn
Publikováno v:
American heart journal. 68
A small portable electric motor and DeBakey type pump which weighs 115 grams has been constructed and tested. Rates of injection of 0.4 to 300 c.c. per hour with voltage control can be maintained for periods of over a week within a few per cent. The
Publikováno v:
American heart journal. 57(2)
A phonocardiographic study was made of the apical diastolic murmurs and sounds encountered in a group of 18 patients with high-grade pure mitral insufficiency. The characteristic diastolic murmur occupied early mid-diastole and usually corresponded t