The relative hemodynamic effects of heart rate, inotropic state, and atrioventricular (AV) synchrony during ventricular pacing were evaluated in 10 patients with normal left ventricular ejection fraction (LVEF) (0.66 +/- 0.07, mean S.D.) and in eight patients with a diminished LVEF (0.34 +/- 0.18). Hemodynamics were measured at AV intervals of 130, 0, and -130 msec during ventricular pacing at ...

OBJECTIVE To develop an isolated working heart model with parabiotic circulation in swine and verify its stability and possibility to allow effective measurements of hemodynamic and metabolic data. METHODS This model was developed during study of association of agents to cardiology. There were performed 18 experiments, each with a support animal and a donor animal. Donor animal heart was perf...

T HE hemodynamic changes in patients with acute myocardial infarction have been the subject of several investigations. In most seriously ill patients the usual circulatory abnormality is a low cardiac output with peripheral vasoconstriction.1-9 Some cases with a high cardiac output have been reported, however, and recently Malmcrona and Varnauskas'0 have shown a correlation between high cardiac...

BACKGROUND AND PURPOSE This study investigated whether in patients with internal carotid artery occlusion the regional cerebral hematocrit correlates with cerebral hemodynamics or metabolic state and, if so, how the regional cerebral hematocrit changes in the hemodynamically compromised region. METHODS We used positron emission tomography to study seven patients with unilateral internal carot...

BACKGROUND The effects of L-carnitine on the hemodynamic state of chronic hemodialysis patients have been debated. In order to clarify the effect of administered L-carnitine on cardiac function and hypotensive episodes during the hemodialysis procedure, a randomized double-blind placebo-controlled study was performed for 3 months. METHODS AND RESULTS TWENTY STABLE OUTPATIENTS UNDERGOING HEMOD...

T HE hemodynamic changes in patients with acute myocardial infarction have been the subject of several investigations. In most seriously ill patients the usual circulatory abnormality is a low cardiac output with peripheral vasoconstriction.1-9 Some cases with a high cardiac output have been reported, however, and recently Malmcrona and Varnauskas'0 have shown a correlation between high cardiac...

OBJECTIVE Persons with elevated blood pressure (BP) show dampened emotional responses to affect-laden stimuli. We sought to further examine cardiovascular-emotional dampening by examination of the relationship between resting hemodynamic measures and recognition of emotion in an African American community-based sample. METHODS Participants were 106 African American men and women (55 women; me...

background : we aimed to compare hemodynamic and endocrine alterations caused by stress response due to proseal laryngeal mask airway and endotracheal tube usage in laparoscopic cholecystectomy. methods : sixty-three asa i-ii patients scheduled for elective laparoscopic cholecystectomy were included in the study. patients were randomly allocated into two groups of endotracheal tube and proseal ...

a varieties of medications have been suggested to prevent hemodynamic instabilities following laryngoscopy and endotracheal intubation. this study was conducted to determine the beneficial effects of gabapentin on preventing hemodynamic instabilities associated with intubation in patients who were a candidate for coronary artery bypass surgery (cabg). this double blinded randomized, parallel gr...