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Results 251 - 300 of 2222
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Silva Serena - - 2013
: A 15-second end-expiratory occlusion increases cardiac preload and allows detection of preload dependence. We tested whether the reliability of this test depends upon positive end-expiratory pressure. : Prospective study. : Medical ICU. : Thirty-four patients presenting with acute circulatory failure and acute respiratory distress syndrome ventilated with a tidal ...
Kim Sang-Hyun - - 2013
Hemodynamic optimization improves postoperative outcomes in high-risk surgery patients. The monitoring of cardiac output (CO) and dynamic parameters of fluid responsiveness can guide hemodynamic optimization. We conducted a survey to assess the current hemodynamic monitoring and management practices of Korean anesthesiologists during high-risk surgery. E-mails containing a link to our ...
Shu Aihua - - 2013
Heart rate variability (HRV) was used in the present study to evaluate a target-controlled approach compared with a constant-rate infusion for remifentanil anesthesia during off-pump coronary artery bypass grafting (OP-CABG) surgery. A total of 65 patients with American Society of Anesthesiologists (ASA) physical status II or III, who were aged ...
Jalali Ali - - 2013
This paper is concerned with predicting the occurrence of Periventricular Leukomalacia (PVL) using vital data which are collected over a period of twelve hours after neonatal cardiac surgery. The vital data contain heart rate (HR), mean arterial pressure (MAP), right atrium pressure (RAP), and oxygen saturation (SpO2). Various features are ...
Fukushima Hayato - - 2013
This study provides cuffless blood pressure estimation. In general, blood pressure changes when the subject's condition changes, and it is important to estimate it continuously and noninvasively. In many previous studies, they used PTT (Pulse Transmission Time) for estimating. However, PTT needs both electrocardiogram and photoplethysmography to be measured. Our ...
Liu An-Bang - - 2013
Cardiac autonomic dysfunction is a serious condition in the elder subjects. Baroreflex sensitivity (BRS) by measuring pulse intervals and blood pressure has been proven as an effective indicator. This paper proposes a novel index by substitution blood pressure with amplitudes of pressure pulse. We recruited 61 subjects divided into two ...
Fassina Lorenzo - - 2013
Many important observations and discoveries in heart physiology have been made possible using the isolated heart method of Langendorff, e.g. the discovery of the very famous Frank-Starling law of the heart. Nevertheless, the Langendorff's method has some limitations and disadvantages such as the probability of preconditioning and a high oxidative ...
Uemura Kazunori - - 2013
Myocardial performance index (MPI), or Tei index, is measured by Doppler echocardiography in clinical practice. MPI has been shown to be useful in evaluating left ventricular (LV) performance and predicting prognosis in cardiac patients. However, the effects of LV load and contractile states on MPI remain to be thoroughly investigated. ...
Yamane T - - 2013
We are developing an axial-flow pump with a cylindrical-impeller without airfoils. In the mock experiments of HA02 model a pressure of 13.3 kPa was obtained at a rotational speed of 12500 rpm and flow of 5L/min. The obtained pressure with HA02 was almost double than an airfoil-type impeller. The 2D ...
Sarlabous L - - 2013
A recursive least square (RLS) adaptive filtering algorithm for reduction of cardiac interference in diaphragmatic mecanomyographic (MMGdi) signals is addressed in this paper. MMGdi signals were acquired with a capacitive accelerometer placed between 7th and 8th intercostal spaces, on the right anterior axillary line, during a maintained inspiratory pressure test. ...
Morariu S S University "Vasile Goldis"- - - 2013
A great physical effort associated with work during night shifts can lead to negative effects on the worker's health. THE AIM of our study is to evaluate the risk of associating great physical effort with night shifts in hypertensive patients. We have studied 2 groups of hypertensive patients, each group ...
Hart Emma C EC School of Physiology and Pharmacology, Bristol Heart Institute, Medical Science Bldg, University of Bristol, Bristol, United - - 2013
Renal denervation has shown promise in the treatment of resistant hypertension, although the mechanisms underlying the blood pressure (BP) reduction remain unclear. In a translational study of spontaneously hypertensive rats (n=7, surgical denervation) and resistant hypertensive human patients (n=8; 5 men, 33-71 years), we examined the relationship among changes in ...
Takei Yoshio - - 2013
Vertebrates have expanded their habitats from aquatic to terrestrial environments, which has accompanied the evolution of cardiovascular and osmoregulatory hormones. Specifically, mammals have developed mechanisms to maintain high blood pressure and blood volume, while extant fishes have developed hypotensive and Na-extruding mechanisms to adapt to the marine environment where they ...
Dillenburg Denise Ruttke - - 2013
Polyphenols consumption detected in red wine and grape juice may prevent or help in the treatment of hypertension. However, cardiovascular autonomic effects of polyphenols were poorly studied. Therefore, we evaluated the effects of resveratrol and grape juice treatments in hemodynamics, baroreflex sensitivity, heart rate (HR) and blood pressure (BP) variability ...
Trepte C J C - - 2013
/st>Predicting the response of cardiac output to volume administration remains an ongoing clinical challenge. The objective of our study was to compare the ability to predict volume responsiveness of various functional measures of cardiac preload. These included pulse pressure variation (PPV), stroke volume variation (SVV), and the recently launched automated ...
Catena Cristiana - - 2013
Long-term exposure to elevated aldosterone levels or activation of the mineralocorticoid receptors results in cardiac, vascular, and renal tissue injury with mechanisms that are independent of blood pressure levels. This evidence has been obtained in experiments conducted in hypertensive animal models and clinical studies involving patients with heart failure, essential ...
Trof Ronald J - - 2013
Sepsis-induced cardiac dysfunction may limit fluid responsiveness and the mechanism thereof remains unclear. Since cardiac function may affect the relative value of cardiac filling pressures, such as the recommended central venous pressure (CVP), versus filling volumes in guiding fluid loading, we studied these parameters as determinants of fluid responsiveness, according ...
Thandapilly Sijo Joseph - - 2013
Cardiac hypertrophy and associated myocardial remodeling is one of the main complications of hypertension resulting in the development of heart failure. It is of great significance to explore novel treatments to reverse cardiac hypertrophy in hypertensives with or without affecting blood pressure. In the present study, we investigated whether low-dose ...
Kolli Kranthi K - - 2013
Objectives and Background: Myocardial fractional flow reserve (FFR) in conjunction with coronary flow reserve (CFR) is used to evaluate the hemodynamic severity of coronary lesions. However, discordant results between FFR and CFR have been observed in intermediate coronary lesions. A functional parameter, pressure drop coefficient (CDP; ratio of pressure drop ...
Xiang Lusha L Department of Physiology and Biophysics, University of Mississippi Medical Center, USA. - - 2013
Hemorrhagic shock leads to a higher risk of mortality and morbidity in obese patients, however the mechanisms for these outcomes are unclear. We hypothesized that following severe hemorrhage, blood pressure control in conscious obese Zucker rats (OZ) is impaired. Experiments were performed in conscious lean Zucker rats (LZ) and OZ. ...
Watanabe Go G Department of General and Cardiothoracic Surgery, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan. - - 2013
The internal thoracic artery (ITA) is a very useful conduit for coronary artery bypass artery (CABG), with excellent long-term patency. With the purpose to dilate the ITA graft and increase graft free flow (GFF) intraoperatively, we evaluated the usefulness of intraluminal injection of fasudil, a Rho-kinase inhibitor, in comparison to ...
Gregori Mario - - 2013
BACKGROUND: Inadequate suppression of renin-angiotensin-aldosterone system (RAAS) following postural maneuvers may have detrimental effects on cardiac structure and function. In this study, we aimed to appraise the clinical significance of this phenomenon by assessing its relation with inappropriate ventricular mass (ILVM), an adverse phenotype of LV remodeling and dysfunction. METHODS: ...
Liu Chuan-Teng - - 2013
Background: Hypokalemia and hypertension are common manifestations of preclinical cardiovascular conditions that have a predictive value for cardiovascular morbidity and mortality. Cardiac hypertrophy, an important risk factor in heart failure, is attributed to long-term hypokalemia and hypertension. Sesame oil is rich in nutrients and possesses potent antihypertensive activities. Methods: We ...
Tijero Beatriz - - 2013
INTRODUCTION: The aim of this study was to compare autonomic function in PD symptomatic carriers of the LRRK2 mutations and idiopathic Parkinson's disease (iPD) patients. MATERIAL AND METHODS: We studied 25 PD patients: 12 with the LRRK2 mutation (6 G2019S and 6 R1441G), and 13 with iPD. All patients underwent ...
Sotomi Yohei - - 2013
FloTrac/Vigileo™ system is based on arterial pressure waveform analysis arterial pressure-based CO (APCO). Therefore, systemic vascular resistance (SVR) can influence the accuracy of APCO. The purpose of this study is to evaluate the relationship between SVR and the accuracy of APCO. We managed 50 consecutive patients in the perioperative period ...
Bermejo Javier - - 2013
In cardiovascular research, relaxation and stiffness are calculated from pressure-volume (PV) curves by separately fitting the data during the isovolumic and end-diastolic phases (EDPVR), respectively. This method is limited because it assumes uncoupled active and passive properties during these phases, it penalizes statistical power and cannot account for elastic restoring ...
Leoncini G - - 2013
Organ damage (OD) is an indicator of increased cardiovascular risk. Blood pressure variability (BPV) is related to greater incidence of events, regardless of the severity of hypertension. We investigated the relationship between ambulatory blood pressure monitoring (ABPM)-derived indices of BPV and the presence of multiple OD in primary hypertension (PH). ...
Tsai Ching-Yi - - 2013
A clinical hallmark of hypertension is impairment of the cardiac vagal baroreflex, which maintains stable blood pressure and heart rate under physiological conditions. There is also evidence that oxidative stress in the brain is associated with neurogenic hypertension. We tested the hypothesis that an augmented superoxide level in the nucleus ...
Moerman A - - 2013
BACKGROUND: /st>Although both pressure and flow are considered important determinants of regional organ perfusion, the relative importance of each is less established. The aim of the present study was to evaluate the impact of variations in flow, pressure, or both on cerebral and whole-body oxygen saturation. METHODS: /st>Thirty-four consenting patients ...
Ghossein-Doha Chahinda - - 2013
Preeclampsia is associated with a 4-fold higher risk for developing remote chronic hypertension. Preeclampsia is accompanied by left ventricular hypertrophy and decreased diastolic function, which may or may not resolve postpartum. We tested the hypothesis that increased measures of cardiac geometry and decreased cardiac function persisting for ≥6 months postpartum ...
Santiago Luiz Miguel - - 2013
INTRODUCTION: Central blood pressure (CBP) is the pressure exerted by the blood column at any given moment on the aortic and carotid artery walls, which is a close proxy for the blood pressure inside the brain and the heart, and is thus a better marker of cardiovascular morbidity and mortality ...
Alosco Michael L - - 2013
BACKGROUND: Reduced systemic perfusion and comorbid medical conditions are key contributors to adverse brain changes in heart failure (HF). Hypertension, the most common co-occurring condition in HF, accelerates brain atrophy in aging populations. However, the independent and interactive effects of blood pressure and systemic perfusion on brain structure in HF ...
Shih Andre - - 2013
OBJECTIVE: To evaluate the hemodynamic effects of using an adhesive glove device (AGD) to perform active compression-decompression CPR (AGD-CPR) in conjunction with an impedance threshold device (ITD) in a pediatric cardiac arrest model. DESIGN: Controlled, randomized animal study. METHODS: In this study, 18 piglets were anesthetized, ventilated, and continuously monitored ...
Guerin Laurent - - 2013
Fluid therapy represents, most of the time, the first-line treatment of circulatory failure in critically ill patients. However, after initial resuscitation, fluid administration can be deleterious in patients with sepsis and/or acute respiratory distress syndrome. In this context, several tests have been developed to predict fluid responsiveness and fluid unresponsiveness ...
Lee Jae Myeong - - 2013
Dynamic estimates of mean systemic pressure based on a Guytonian analog model (Pmsa) appear accurate under baseline conditions but may not remain so during septic shock because blood volume distribution and resistances between arterial and venous beds may change. Thus, we examined the effect of acute endotoxemia on the ability ...
Goepfert Matthias S - - 2013
BACKGROUND:: The authors hypothesized that goal-directed hemodynamic therapy, based on the combination of functional and volumetric hemodynamic parameters, improves outcome in patients with cardiac surgery. Therefore, a therapy guided by stroke volume variation, individually optimized global end-diastolic volume index, cardiac index, and mean arterial pressure was compared with an algorithm ...
Bouzat Pierre - - 2013
AIM: Improving cerebral perfusion is an essential component of post-resuscitation care after cardiac arrest (CA), however precise recommendations in this setting are limited. We aimed to examine the effect of moderate hyperventilation (HV) and induced hypertension (IH) on non-invasive cerebral tissue oxygenation (SctO2) in patients with coma after CA monitored ...
Mandoki Juan José - - 2013
The diastolic pulsatile increase in arterial blood pressure is shown to occur earlier in the aorta than in other arteries. It is thus not a reflection of the systolic pressure wave, as has been generally assumed, but an independent pressure wave produced by the sequential contraction of the arterial tree. ...
Brown Z E - - 2013
In this prospective observational study we investigated the changes in cardiac index and mean arterial pressure in children when positioned prone for scoliosis correction surgery. Thirty children (ASA 1-2, aged 13-18 years) undergoing primary, idiopathic scoliosis repair were recruited. The cardiac index and mean arterial blood pressure (median (IQR [range])) were ...
Russo Andrea - - 2013
STUDY OBJECTIVE: To determine the effect of positive end-expiratory pressure (PEEP) on the respiratory system and on cardiac function. DESIGN: Prospective randomized study. SETTING: Operating room. PATIENTS: 60 ASA physical status 1 women scheduled for pelvic laparoscopic surgery. INTERVENTIONS: Patients were ventilated normally during surgery; PEEP was modified depending on ...
Garcia-Menendez Lorena L Mitochondria and Metabolism Center, Department of Anesthesiology, University of Washington, Seattle, WA 98109, - - 2013
The C57BL/6 mouse strain is one of the most commonly used in experimental research. It is known to differ from other strains in baseline cardiovascular phenotypes as well as in response to pressure overload induced by aortic constriction. Since the generation of the C57BL/6 mouse line over a century ago, ...
Tanigawa-Sugihara Kayo - - 2013
Background: Weather conditions affect the occurrence of cardiovascular disease. The aim of this study was to investigate the associations between atmospheric conditions including temperature, pressure, and humidity, and the occurrence of out-of-hospital cardiac arrests (OHCAs) with cardiac etiology. Methods and Results: This study was a cross-sectional analysis of a prospective cohort that ...
Dolinsky Vernon W - - 2013
Resveratrol (RESV) is a polyphenol with pleiotropic effects that include reduction of oxidative stress and increased vascular nitric oxide (NO) production. However, whether or not RESV can prevent rises in blood pressure (BP) is controversial and remains to be firmly established. The purpose of this study was to determine whether ...
Ngan Kee W D - - 2013
BACKGROUND: Phenylephrine given during spinal anaesthesia for caesarean delivery often induces a decrease in heart rate which may decrease cardiac output. Anticholinergic drugs may be given to attenuate this effect but may also cause more labile blood pressure. This study evaluated the effects of glycopyrrolate pre-treatment on non-invasively measured cardiac ...
Franchi Federico - - 2013
Hypertension continues to be a significant cause of morbidity and mortality, underscoring the need to better understand its early effects on the myocardium. The aim of this study is to determine the feasibility of in vivo longitudinal assessment of cardiac function, particularly diastolic function, in a mouse model of renovascular ...
Eldehni Mohamed Tarek - - 2013
BACKGROUND: Haemodialysis is a form of renal replacement therapy used to treat patients with end stage renal failure. It is becoming more appreciated that haemodialysis patients exhibit higher rates of multiple end organ damage compared to the general population. There is also a strong emerging evidence that haemodialysis itself causes ...
Sezai Akira - - 2013
Background: Febuxostat has been reported to have a stronger effect on hyperuricemia than allopurinol. Methods and Results: Cardiac surgery patients with hyperuricemia (n=141) were randomized to a febuxostat group or an allopurinol group. The study was single-blind, so the treatment was not known by the investigators. The primary endpoint was serum uric ...
Mahfouz Ragab A - - 2013
Fractional pulse pressure (PPf), is thought to more directly reflect arterial stiffness than pulse pressure. Our aim was to evaluate the relationship between coronary flow reserve (CFR), left ventricular diastolic function (LVDf) and PPf in hypertensive patients with normal coronary arteries. Out of 109 hypertensive patients (aged 52.8 ± 9.4 years), with normal ...
Friis Schmidt Jakob - - 2013
INTRODUCTION: Patients with type 2 diabetes (T2DM) have an increased risk of cardiovascular disease which is worsened by physical inactivity. Subclinical myocardial dysfunction is associated with increased risk of heart failure and impaired prognosis in T2DM; however, it is not clear if exercise training can counteract the early signs of ...
Wajima Zen'ichiro - - 2013
PURPOSE: There are no reports about the effect of bradycardia on stroke volume variation (SVV), and we hypothesized that induced bradycardia alters the value of SVV. Landiolol, an ultra-short-acting adrenergic β1-receptor blocking agent, was reported to induce bradycardia without decreasing blood pressure. The initial aim of this prospective study was ...
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