Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 77 for “"Stroke volume"”.
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The Effect of Selective Hypothermia on Stroke Volume
… studied the effect of selective hypothermia on stroke volumes in adult domestic swine. Under general anesthesia, one MCA was occluded transcranially for 3 hours followed by 3 hours of reperfusion. In half the animals, hypothermia was induced during reperfusion via a dual-lumen balloon occlusion …
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Magnetic resonance imaging of the right ventricle in human pulmonary hypertension
… reasons for right and left ventricular stroke volume impairment during exercise in PH patients. ∆ RV stroke volume appeared limited by diminished contractile reserve as ∆ RVEF was lower in PH patients (27%) compared to controls (38%) and ∆ RVEF correlated with ∆ RV stroke volume (r = …
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THE RELATIONSHIP BETWEEN AEROBIC TRAINING AND CARDIOVASCULAR RESPONSE TO EXERCISE
… the effect of short-term training-induced plasma volume expansion on the cardiac and peripheral vascular capacity of untrained males (n=14) was examined. Impedance cardiography was used to examine stroke volume and cardiac output, whereas resting and peak blood flow were assessed using …
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Hemodynamic Responses to Isometric Contractions of the Finger Flexor and Leg Extensor Muscle Groups in Men 18-30 and 50-70 Years of Age
… which cardiovascular variables(s), heart rate, stroke volume, cardiac output, total peripheral resistance, systolic blood pressure, diastolic blood pressure, pulse pressure, and mean arterial pressure demonstrated significantly different responses to isometric exercise between the two age …
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Assessment of Blood Flow in the Human Calf During Maximal Intermittent Dynamic Exercise Utilizing Impedance Plethysmography
… blood flow, peripheral pulse rate, calf blood volume/beat, cardiac output, cardiac index, heart rate and stroke volume. During rest significant differences (p (LESSTHEQ) .05) between groups were found for peripheral pulse rate, cardiac output, heart rate and stroke volume. During exercise a …
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Effect of Endurance Arm Training on Selected Components Which Influence the Oxygen Uptake During Arm and Leg Exercise
… and leg exercise. Further, cardiac output and stroke volume became the dominate factors contributing to oxygen uptake during maximal arm exercise after training. Prior to training, the (a-v)O(,2) diff accounted for the largest proportion of variance in the oxygen uptake. During maximal leg …
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A wearable heart monitor at the ear using ballistocardiogram (BCG) and electrocardiogram (ECG) with a nanowatt ECG heartbeat detection circuit
… electrocardiogram (ECG) to extract heart rate, stroke volume, and pre-ejection period (PEP) for the application of continuous heart monitoring. Being a natural anchoring point, the ear is demonstrated as a viable location for the integrated sensing of physiological signals. The source of …
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Development of a method for calculation of cardiac output using Doppler ultrasound
… an ultrasound beam is incident on the aorta. Stroke volume is the product of the cross sectional area of the aorta and the integration of peak velocity over time. Stroke volume times the heart rate is the cardiac output. This project attempts to develop an algorithm that would automatically …
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Moderating effect of a single aerobic exercise session on the cardiovascular response to a stressful procedure 45 minutes later
… exercise or attention control sessions, BP, HR, stroke volume (SV) and total peripheral resistance (TPR) were measured at baseline, during a pre-stressor anticipation period, and during the cold pressor test. stroke volume was measured with impedance cardiography and total peripheral resistance …
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Cardiovascular responses to two minutes of isometric contractions of the finger flexors in healthy women
… arterial pressure (MAP), pulse pressure (PP), stroke volume (SV) and cardiac output (CO).
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Developmental physiology of the red swamp crayfish Procambarus clarkii
… animal. Cardiovascular parameters (heart rate, stroke volume, and cardiac output) were determined throughout development by using a videomicroscopy technique and dimensional analysis. Heart rate, stroke volume, and cardiac output measured throughout development of the crayfish decreased …
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In-ear Audio For Physiological Monitoring
… vital signs: heart rate, respiratory rate, and stroke volume. For each of these, we develop novel sensing pipelines that leverage the unique properties of in-ear audio, including its ability to capture both heart sounds and footstep sounds. First, we study heart rate monitoring under conditions …
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Cardiac Structure and Function in Young Athletes
… (LVDs), left ventricular posterior wall (PW), stroke volume (SV) and cardiac output (CO). On separate days, tests were conducted on a cycle ergometer to measure VO2max and anaerobic power, and skeletal muscle strength and endurance was determined on an isokinetic dynamometer. The relative peak …
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Novel mechanisms for buffering the haemodynamic effects of dietary salt and the relevance of skin sodium in humans
… an additional system for maintaining BP and volume homeostasis in response to salt load. The focus of this thesis is to determine whether these dermal mechanisms exist in humans. Methods: The technique of measuring skin Na+ and K+ using inductively coupled plasma optical emission spectrometry …
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The effect of skin temperature on cardiovascular responses during endurance exercise
… and the independent effect of heart rate on stroke volume when Tsk is hot and cold during moderate intensity endurance exercise. In study 1, we systemically evaluated the effect of graded increases in T [subscript sk] from 32°C to 39°C on cardiovascular responses during 20-30 min cycling …
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The Efficacy Of Prostaglandin Synthase Inhibition On Attenuating Pressure Overload Induced Cardiac Remodeling
… and functional changes were measured by pressure-volume admittance catheterization. Human cardiac fibroblasts were used to assess the specific mechanistic pathways associated with prostaglandin D2 (PGD2) mediated fibrotic response. At the 14 day period, pressure overloaded animals shosignificant …
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Understanding and measuring flow in aortic stenosis with MRI
… it was found that the phase contrast estimate of stroke volume, sampled in the stenotic jet, systematically underestimated left ventricular stroke volume. This underestimation was greater with increasing aortic stenosis severity. Critical clinical treatment decisions depend on the ability to …
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The impact of morbid obesity on cardiac structure and function in pregnancy
… 2729 [623] mL.min⁻¹.m⁻², P=0.156, respectively). Stroke volume index was lower, and left ventricular mass higher in Group O (30.14 [4.51] vs 34.25 [7.00] mL.m⁻², P=0.003; 152 [24] vs 115 [29] g, P<0.001). Isovolumetric relaxation time was significantly prolonged in Group O (73 [15] vs 61 [15] …
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Quantitative volumetric study of brain in chronic striatolenticular stroke
… Occlusions of these arteries cause a small stroke but have a devastating effect on patients’ functions. Previous studies showed that the anterior two thirds of the internal capsule is occupied by the prefrontal tracts with the posterior one third by connection to/from sensorimotor, temporal …
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Controlled cross circulation: effects on donor hemodynamics
… max, pulmonary capillary wedge pressure, blood volume, systemic vascular resistance, heart rate, total protein, platelet count, and white blood cell count did not change significantly. Donor cardiac output, end diastolic volume, central venous pressure, stroke volume, mean arterial blood …
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