OBJECTIVES Although stentless aortic bioprostheses are believed to offer improved outcomes, benefits remain unsubstantiated. The aim of our study was to compare stentless with stented bioprostheses, with regard to postoperative changes in left ventricular mass and hemodynamic performance, in the elderly patient. METHODS Forty patients with aortic stenoses, over the age of 75 years, were rando...

SUZUKI, H., KAWAKAMI, Y, and FUJITA, M. Electroencephalographic Patterns Related to Hemodynamic Changes at the Onset of Cardio-Pulmonary Bypass Circulation. Tohoku J. Exp. Med., 1991, 164(4), 331-337 Electroencephalographic (EEG) changes in relation to hemodynamic changes at the onset of cardio-pulmonary (C-P) bypass circulation in 31 cases undergoing open heart surgeries were studied. Rapid an...

OBJECTIVES We sought to determine whether or not inhaled nitric oxide (NO) could improve hemodynamic function in patients with right ventricular myocardial infarction (RVMI) and cardiogenic shock (CS). BACKGROUND Inhaled NO is a selective pulmonary vasodilator that can decrease right ventricular afterload. METHODS Thirteen patients (7 males and 6 females, age 65 +/- 3 years) presenting with...

In the present study, we monitored hemodynamic responses in rat brains during transcranial direct current stimulation (tDCS) using functional near-infrared spectroscopy (fNIRS). Seven rats received transcranial anodal stimulation with 200 μA direct current (DC) on their right barrel cortex for 10 min. The concentration changes of oxygenated hemoglobin (oxy-Hb) were continuously monitored during...

A prompt behavioral response to a stimulus depends both on the salience of the stimulus as well as the subject's preparedness. Thus, both stimulus properties and cognitive factors, such as attention, may determine the strength of neuronal synchronization in the gamma range. For a comprehensive investigation of stimulus-response processing through noninvasive imaging, it is, however, a crucial i...

Functional brain imaging techniques depend on the relationship between regional hemodynamic responses and neural activity. The positive hemodynamic response (PHR) has widely been discussed and has generally been associated with an increase in neuronal signals. In contrast, the negative hemodynamic response (NHR) has not been investigated extensively, and its underlying nature is highly controve...

ALTHOUGH the two-step exercise test of Master1 has been used extensively to produce electrocardiographic changes of acute coronary artery insufficiency, results of directly measured hemodynamic changes during the recovery period have not been reported. Indirectly measured hemodynamic changes following this two-step test have been reported infrequently since the tables of standardized stress wer...

Introduction The study examined the effects of cuff inflation of a ProSeal Laryngeal Mask Airway on the carotid bulb during sevoflurane induction in pediatric population. The hemodynamic parameters measured were: systolic and diastolic pressure, heart rate and sovraortic flow trough measurements of bilateral carotid cross sectional area, velocity of blood flow, resistance index, flow accelerati...

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...