| VECTORCARDIOGRAM AND AORTIC BLOOD FLOW OF SQUIRREL MONKEYS (SAIMIRI SCIUREUS) IN A STRONG SUPERCONDUCTIVE ELECTROMAGNET. |
APR 1968 |
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| Authors:
Dietrich E. Beischer; NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA
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 | In the future, strong magnetic fields will play a greater role in the environment of man. In preparation for this the frontal plane ECG of subhuman primates in strong magnetic fields (100,000 oersted) was recorded. A pulsating electrical signal (flowgram) was found superimposed on the ECG, giving information on mechanical as well as electrical performance of the heart. No influence of the magnetic field on cardiac regulation was observed during ... |
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| EFFECT OF BLOOD PH AND CO2 TENSION ON THE PERFORMANCE OF THE HEART-LUNG PREPARATION. |
13 NOV 1967 |
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| Authors:
N. S. Nejad; Eric Ogden; NAVAL AEROSPACE MEDICAL INST PENSACOLA FLA
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| When the performance of heart-lung preparations was evaluated by the relationship between stroke work and left atrial pressure, a change of the CO2 content of the inspired air from zero to 10 per cent caused a progressive decrease in performance. The use of HCl or NaHCO3 allowed for changing the pH and pCO2 of the arterial blood separately. Arterial blood pH rather than blood pCO2 appeared to be the decisive ... |
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| VISCERAL AFFERENT ACTIVITY EFFECTS ON BRAIN STEM RETICULAR FORMATION. |
31 JUL 1966 |
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| Authors:
P. C. Dell; HOPITAL HENRI ROUSSELLE PARIS (FRANCE) LABORATOIRE DE NEUROPHYSIOLOGIE
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| The main themes of the present investigations concern: Electrophysiological studies of the somatic and the vegetative effects of baroceptive inputs. The following points were investigated: Electroneurogram of the Aortic Nerves and nature of the fibers involved in the sleep-inducing effects. Evolution of baroceptive discharges during the cardiac cycle. Vagal efferent discharges in response to artificial (electrical stimulation) or natural inputs through the Aortic Nerve. Central projections of baroceptive afferents in ... |
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| HEMODYNAMIC ALTERATIONS IN HUMANS AND ANIMALS DURING CHRONIC HIGH ALTITUDE EXPOSURE, |
JUN 1966 |
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| Authors:
James A. Vogel; James E. Hansen; John P. Hannon; ARMY MEDICAL RESEARCH AND NUTRITION LAB DENVER COLO
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| It is concluded from these studies that the heart and circulation are capable of meeting the demands of oxygen delivery during heavy work at altitudes up to 14,000 ft. There was no evidence of any deleterious effect on the circulatory system nor of any reduced efficiency in the heart's action. Even though maximum performance is reduced at this elevation, it does not appear that the heart and circulation are responsible. ... |
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| PULMONARY SHUNT DURING POSITIVE PRESSURE VENTILATION AND GENERAL ANESTHESIA. |
1943 |
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| Authors:
Richard J. Ward; Henry D. Green; John Takamura; Theodore N. Finley; John J. Bonica; WASHINGTON UNIV SEATTLE
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| A series of patients who had general anesthesia for elective surgical procedures was studied. Intraarterial and right atrial catheters were placed preoperatively, control studies including cardiac-output were made, and the patients anesthetized with halothane. Cardiac-output and pulmonary shunt determinations were made under light and deep halothane anesthesia, and then the patients were maintained in a light plane of anesthesia with halothane, paralysed with auccinylcholine, and connected to the positive ... |
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| DIAGNOSTIC CRITERIA FOR SUB-CLINICAL CORONARY ARTERY DISEASES; ENGINEERING ANALYSIS OF 3-DBCG SUSPENSIONS. |
1942 |
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| Authors:
JOHNS HOPKINS UNIV BALTIMORE MD
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| Contents: An investigation using normals and coronary artery disease (CAD) patients of changes in the ballistocardiogram (BCG) with exercise and other variables; A combinational analysis of the diagnostic weight of various BCG features, in relation to CAD; A theoretical and experimental investigation of the distributed elastic properties of the body, in relation to its resonant properties when resting on a BCG platform; and Engineering developments associated with improving the accuracy, ... |
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(CARDIOVASCULAR SYSTEM
