Search for dissertations about: "hemodynamic responses"

Showing result 1 - 5 of 22 swedish dissertations containing the words hemodynamic responses.

2. 1. Hemodynamic, respiratory and neorophysiological reactions after high : velocity behind armor blunt trauma

   Author : Dan Gryth; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : This thesis is addressing Behind Armor Blunt Trauma (BABT), defined as the nonpenetrating injury resulting from a ballistic impact on personal body armor. The protective vest may impede the projectile, but some of the kinetic energy is transferred to the body, causing effects such as pulmonary contusion, apnea, hypotension and occasionally death. READ MORE

4. 2. Cardiovascular and sympatho-adrenal responses to mental stress with special reference to the regulation of human forearm blood flow

   Author : Madeleine Lindqvist; Karolinska Institutet; Karolinska Institutet; []
   Keywords : adrenaline; axillary blockade; beta-receptor blockader; calcium channel blockers; cholinergic blockingagents; felodipine; hypertension-primary; noradrenaline; skeletal muscle; sodium nitroprusside; stress-psychologicai; vascular resistance;

   Abstract : The cardiovascular and sympatho-adrenal responses to a standardized mental stress test (Stroop's colour word conflict test CWT) were studied in 63 healthy and 11 hypertensive men by intraarterial pressure measurements, forearm blood flow by occlusion plethysmography and noradrenaline (NA) and adrenaline (ADR) determinations in arterial and venous plasma. One study included central hemodynamics by right heart catheterization and NA turnover by an isotope dilution method, permitting studies of NA kinetics in the whole body and in a regional vascular bed (the forearm) in hypertensive patients and age-matched controls. READ MORE

5. 3. Effects of physical activity and gravitational stress on cardiovascular control

   Author : Patrik Sundblad; Karolinska Institutet; Karolinska Institutet; []
   Keywords : leg exercise; posture; blood pressure; heart rate; cardiovascular model; heart function; stroke volume; tilting; orthostasis; simulated weightlessness; long-term hypokinesia;

   Abstract : The long-term goal of the present work was to characterize the responses to gravitational challenges in exercising humans after long-term head-down-tilt bedrest (HDT). HDT is a simulation of weightlessness with respect to effects on the systemic circulation, and previous studies in resting men have suggested that impairments of arterial baroreflexes contribute to the orthostatic intolerance seen after HDT and spaceflight. READ MORE

6. 4. Cardiovascular function after long-term bed rest

   Author : Jonas Spaak; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Microgravity; simulated weightlessness; carotid baroreflex; static exercise; muscle chemoreflex; orthostasis; tilting; leg exercise; blood pressure; heart rate; stroke volume;

   Abstract : On earth, daily activities involve standing, changes of posture and various types of muscle action, all of which challenge the cardiovascular regulation. Removal of the orthostatic stress for a longer period, as during spaceflight or head-down tilt bed rest, consistently results in cardiovascular deconditioning. READ MORE

7. 5. Afterload system design for functional donor heart assessment

   Author : Harry Pigot; Institutionen för reglerteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; physiological modelling; cardiac afterload; heart assessment; working heart; simulation; control of physiological and clinical variables;

   Abstract : Heart transplantation is a life-saving procedure for patients with end-stage heart failure. However, conservative acceptance criteria result in most donated hearts being discarded. Enabling clinicians to assess heart function after organ procurement can pave the way for the safe use of hearts that are currently rejected. READ MORE