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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Hemodynamic effect of lidocaine given by infusion and bolus injections in myocardial infarction, examining cardiac output, heart rate, systolic left ventricular and aortic pressures
Real time contourographic electrocardiographic display determining heart rate from CRT face on beat-by-beat basis
Effects of weightlessness on body temperature and heart rate determined by 56 day bed rest study
Performance of impedance cardiograph for measuring heart rate and body fluids
Metabolic effects of long duration exercise at moderate work loads including tables of heart rate, rectal temperature, minute volume, water balance, and respiratory quotient
Application of reflected ultrasound to detection of post-operative rejection of heart transplant
Human orthostatic tolerance measurement via leg and lower body negative pressure, discussing heart rate and stroke volume variations
In-flight monkey cardiovascular observations, discussing central venous pressure, urine volume, electrolyte imbalances and heart rate
Cardiac arrhythmias simulated by concealed bundle of His extrasystoles in open chest intact dog hearts
Dynamic respiratory and circulatory responses to hypoxia in anesthetized dogs, recording oxygen partial pressures, heart rate, blood pressure, blood flows, respiratory rate, etc
Large amplitude wave propagation in arteries, deriving aorta mathematical model consistent with heart pressure and flow pulses and wavefront velocity
Human physiological responses to rotating environment, evaluating heart rates, blood pressure, pulmonary functions, visual observations and vital capacities
Isoproterenol, atrial pacing, ouabain and methoxamine effects on dogs during experimental cardiac tamponade, observing arterial pressure, cardiac output and heart rate changes
Ejection fraction relation to left ventricular dimensional changes in patients with heart disease, using angiocardiograms
Hemodynamic evaluation of heart rate augmentation produced by atrial pacing and isoprotenol in early postoperative phase of cardiac valve surgery
Moderate heat exposure effects on human circadian variations in body temperature, heart and metabolic rates and water loss
Electronic circuit processes arterial blood pressure waveform to produce discrete signals that coincide with beginning and end of left ventricular ejection. Output signals provide timing signals for computers that monitor cardiovascular systems. Circuit operates reliably for heart rates between 50 and 200 beats per minute.
The deconditioning effects of weightlessness on the cardiovascular system of astronauts are discussed. It is believed that man cannot tolerate indefinite exposure to weightlessness without considerable circulatory deterioration. Analyses of data collected from space flights to date substantiate these beliefs, and confirm the fact that some form of compensation must be provided to keep the cardiovascular system of space travelers properly conditioned. Sequential pulsatile devices were investigated to produce periodic hydrostatic pressure gradients in the venous system of eight subhuman primates. Intermittent venous pooling of blood in the extremities triggers and stimulates the vascular reflex mechanisms of the cardiovascular system that may have significant benefits in maintaining the circulatory system in proper tone under weightless conditions. Electrocardiograms, blood pressure measurements, cardiac output and stroke volume determinations were used to evaluate the efficiency of the described technique. Results were amazingly consistent to indicate an efficient system for intermittently exercising the heart within safe and medically acceptable limits.