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Kang Soo-Jin - - 2008
BACKGROUND: The assessment of dynamic intraventricular dyssynchrony has been reported to be feasible in a clinical setting. However, its prognostic implication in functional improvement has not yet been investigated. METHODS: Symptom-limited, supine bicycle exercise was performed on 41 patients with nonischemic cardiomyopathy (52 +/- 12 years, ejection fraction < 40%). ...
Rowland Thomas - - 2009
The effect of body posture (e.g., gravity) on circulatory responses to exercise remains to be clarified. This study was designed to examine cardiovascular dynamics during prone swim bench exercise in age-group swimmers and to compare these responses to those of matched non-athletic children. Fourteen trained swimmers (mean age 11.3+/-0.5 years) ...
Dawson J - - 2008
BACKGROUND: We combined a large clinical stroke registry with the UK Met Office database to assess the association between meteorological variables and specific clinical subtypes of acute stroke. METHODS: We used negative binomial regression and Poisson regression techniques to explore the effect of meteorological values to hospital with acute stroke. ...
Rowland Thomas - - 2008
Cardiac ultrasound techniques have provided an abundance of empirical information regarding normal circulatory responses to dynamic exercise. These data are consistent with a schema by which alterations in peripheral resistance, effected by arteriolar dilatation, facilitate blood flow to exercising muscle and match these responses to increasing metabolic demand. In this ...
Olson Lyle J - - 2008
Instability of breathing control due to heart failure (HF) manifests as exercise oscillatory ventilation (EOV). Prior descriptions of patients with EOV have not been controlled and have been limited to subjects with left ventricular ejection fraction (LVEF) of <or= 0.40. The aim of this study was to compare clinical characteristics ...
Ciampi Quirino - - 2007
BACKGROUND: Abnormal blood-pressure response during exercise occurs in about one third of patients with hypertrophic cardiomyopathy (HCM), and it has been associated with a high risk of sudden cardiac death. We assessed the hemodynamics of exercise in HCM patients with abnormal blood-pressure response by using ambulatory radionuclide monitoring (VEST) of ...
Burns Andrew T - - 2008
BACKGROUND: Left ventricular torsion, resulting from the rotation of the base and apex of the ventricle in opposite directions, may be an important component of normal cardiac function both at rest and with exercise. The effect of exercise on torsion in the general population and the influence of aging on ...
Gourgoulis V - - 2008
The aim of this research was to study the effect of hand paddles on the pitch, the sweepback angles and other stroke kinematic characteristics of the hand during front crawl swimming. Ten female competitive swimmers swam without and with small (116 cm (2)) and large (268 cm (2)) paddles. Four ...
Akima Takashi - - 2007
Resting cardiac function is a poor indicator of functional cardiac reserve that is invoked during exercise. The objective of this study was to investigate the relationship between functional cardiac reserve and systemic vascular resistance (SVR) using an ambulatory radionuclide monitoring system (the Vest system) in patients with heart disease. The ...
Appelros Peter - - 2007
PURPOSE: To further describe the properties of Frenchay Activities Index (FAI) with special emphasis on relationships with stroke severity and cognition. METHODS: Survivors from a population-based first-ever stroke cohort (n = 246) were assessed with FAI one year post-stroke. At the same time patients were asked about their status pre-stroke. ...
Anwar Ashraf M - - 2008
BACKGROUND: Determination of left atrial (LA) size and function is important in clinical decision-making. Calculation of LA volume (LAV) is the most accurate index of LA size. AIM: To compare real-time 3-dimensional echocardiography (RT3DE) and 2-dimensional echocardiography (2DE) for calculation of LAV and function. METHODS: Fifty patients were studied using ...
van den Berg Jochem - - 2008
PURPOSE: Our study aimed to assess pro-arrhythmogenic electrocardiographic changes during maximal physical exercise in patients operated for Tetralogy of Fallot (TOF). METHODS: TOF patients prospectively underwent: 1) bicycle ergometry, 2) cardiac MRI, and 3) 24-hour Holter. ECG data was analyzed at rest, at 60% of peak exercise and at peak ...
Smart Neil - - 2007
BACKGROUND: Exercise training improves functional capacity in patients with systolic dysfunction (SD), but the role of exercise training in diastolic dysfunction (DD) is unclear. We compared the responses of patients with exercise intolerance and SD or DD to 16 weeks of exercise training. METHODS: Fifty-one patients with SD and DD ...
Schaefer W M - - 2007
AIM: Using 8-frames/cardiac cycle with gated SPECT underestimates end-diastolic volumes (EDV) and ejection fractions (LVEF), and overestimates end-systolic volumes (ESV). However, using 16-frames/cardiac cycle significantly decreases the signal-to-noise-ratio. We analyzed 16-frames and rebinned 8-frame gated SPECT data using common 4D-MSPECT and QGS algorithms. PATIENTS, METHODS: 120 patients were examined using ...
Sundstedt Milena - - 2007
Doppler echocardiography was used to describe left ventricular filling and ejection during upright bicycle exercise in 24 healthy male endurance athletes. The transmitral pressure gradient was estimated and isovolumetric relaxation, filling and ejection time and transmitral and aortic flow velocities were measured at rest and during exercise. From rest to ...
Middleton Natalie - - 2007
PURPOSE: The present study examined the impact of repeated bouts of prolonged (< 60 min) exercise on left ventricular function and cardiac biomarkers. METHODS: Ten athletes completed a 15.3-mile hill run on three consecutive days and were assessed before, immediately after, 1 h after, and 20 h after each bout. ...
Groepenhoff Herman - - 2007
The intra-breath technique to measure acetylene absorption offers the possibility to determine augmentation of the pulmonary blood flow per heart beat (Q(C)) as an estimate of the stroke volume response during exercise. However, this method has not been compared with a validated test until now. Therefore, the aim of this ...
Borlaug Barry A - - 2006
BACKGROUND: Nearly half of patients with heart failure have a preserved ejection fraction (HFpEF). Symptoms of exercise intolerance and dyspnea are most often attributed to diastolic dysfunction; however, impaired systolic and/or arterial vasodilator reserve under stress could also play an important role. METHODS AND RESULTS: Patients with HFpEF (n=17) and ...
Otsuki T - - 2006
BACKGROUND: Effective arterial elastance (Ea), an index of arterial load, increases with elevations in left ventricular elastance to maximize the efficiency of left ventricular stroke work during exercise. Systemic arterial compliance (C) and vascular resistance (R) are the primary components contributing to Ea, and R plays a greater role in ...
Giardini Alessandro - - 2006
BACKGROUND: Patients with atrial repair for transposition of the great arteries and patients with congenitally corrected transposition have a right ventricle (RV) in the systemic position and they may develop RV dysfunction and exercise intolerance with advancing age. No data is available on the effect of carvedilol in patients with ...
Kirkeby-Garstad Idar - - 2006
Early mobilization after cardiac surgery induces a marked reduction in mixed venous oxygen saturation (Svo2). Using pulmonary artery catheters and indirect calorimetry, we investigated the effects of exercise and postural change on cardiac index (CI) and Svo2 before and on the first morning after coronary artery bypass surgery. Sixteen patients ...
Nygaard Marianne - - 2006
BACKGROUND: Wear-resistant bearing materials may hypothetically reduce chronic inflammation in the pseudosynovial membrane as compared to less wear-resistant bearing materials such as polyethylene. We assessed the foreign body response in the pseudosynovial membrane in vivo after total hip replacement. METHODS: 37 patients from a larger prospective randomized trial of 225 ...
Jhoo Jin-Woo - - 2006
Kava (Piper methysticum), a perennial shrub native to the South Pacific islands, has been used to relieve anxiety. Recently, several cases of severe hepatotoxicity have been reported from the consumption of dietary supplements containing kava. It is unclear whether the kava constituents, kavalactones, are responsible for the associated hepatotoxicity. To ...
Tulloh L - - 2006
There is concern about whether cardiac damage occurs as a result of prolonged strenuous exercise. To investigate whether competing in a triathlon is associated with cardiac damage based on a sustained increase in cardiac troponin T (cTnT), and whether such an increase correlates with echocardiographic changes cTnT and echocardiographic measurements ...
Kasikcioglu E - - 2006
The aim of this study was to evaluate left atrial (LA) volume and its changes with the phases of atrial filling, and to examine the effect of exercise capacity on these parameters. Using two-dimensional echocardiography, LA volumes were measured in 30 male endurance runners and 30 age-matched sedentary men (controls). ...
Middleton Natalie - - 2006
PURPOSE: Evidence supporting cardiac fatigue following prolonged endurance exercise remains equivocal. The purpose of this meta-analysis was to quantify all data fulfilling the specified inclusion criteria, examining the short-term effect of prolonged endurance exercise on left ventricular function. METHODS: A random effects meta-analysis of the weighted mean change in ejection ...
Dasselaar Judith J - - 2006
Achieving an optimal post-hemodialysis hydration status may be difficult because objective criteria for dry weight are lacking. Both relative blood volume changes (DeltaRBV) at the end of hemodialysis and DeltaRBV normalized for ultrafiltration volume (DeltaRBV/UF ratio) have been reported to indicate post-hemodialysis volume status. A parameter for volume status should ...
Esformes Joseph I - - 2006
PURPOSE: Postexercise hypotension (PEH) has been observed in males and females; however, the impact of menstrual cycle phase upon PEH has not been evaluated. We examined the pattern of PEH in the early follicular (EF), late follicular (LF), and midluteal (ML) phases of the menstrual cycle in eight eumenorrheic women ...
Hayashi, Yukiko
HAYASHI, Y., KAWAGUCHI, K. and ONARI, K., Influence of Blood Volume In Exercising Muscle on Stroke Volume Declining During Prolonged Exercise. Abv. Exerc. Sports Physiol., Vol.8, No.2 pp.31-38, 2002. In the present study, circulatory response during prolonged exercise, especially blood volumes in the skin and exercising muscles, were evaluated to ...
Ramsay Donna T - - 2005
This study aimed to use ultrasound imaging to investigate the milk ejection characteristics of women during a 10-minute expression using an electric breast pump capable of applying 2 markedly different vacuum patterns. The classic pattern (47 cycles/min) and 3-phase pattern (pre-milk ejection: 120 cycles/min, post-milk ejection: 20 cycles/min for 2 ...
Tops Laurens F - - 2005
PURPOSE: To prospectively assess regional systemic right ventricular (RV) function at rest and in response to exercise by using magnetic resonance (MR) imaging in patients who have undergone surgical correction at the atrial level for transposition of the great arteries (TGA). MATERIALS AND METHODS: Informed consent was obtained, and the ...
Skrabal Falko - - 2005
Methods for stroke volume (SV) and ejection fraction (EF) measurements require the presence of qualified physicians and are not suited for continuous monitoring. To develop an automated non-invasive method for the measurement and continuous monitoring of SV and EF. We have designed a method for the measurement of EF and ...
Shizukuda Yukitaka - - 2005
The mechanisms underlying reduced exercise capacity in patients with nonobstructive hypertrophic cardiomyopathy (NHCM) could include perturbations of ventricular relaxation, diastolic compliance, or compensatory atrial systolic function. We hypothesized that a loss of atrial contractility in NHCM patients leads to reduced functional capacity. To test this hypothesis, we compared resting noninvasive ...
Bacal Fernando - - 2005
BACKGROUND: Right ventricular (RV) dysfunction remains one of the most prominent complications during the period immediately after heart transplantation (HT); however, late adaptation of the RV has not been well described. The aim of our study was to evaluate RV function and remodeling using magnetic resonance imaging (MRI) and to ...
Sari Ramazan - - 2005
PURPOSE: Comparatively few prospective studies have investigated the relationship between physical activity and gallbladder motility, and the results are controversial. Exercise may affect gallbladder motility via neural or hormonal mechanisms. The purpose of this study was to evaluate the possible effects of aerobic exercise on gallbladder motility in a group ...
Haykowsky Mark - - 2005
This study examined the effect of 12 weeks of combined aerobic and resistance training on aerobic capacity, left ventricular ejection fraction, and arterial afterload during submaximal cycle exercise in 18 recent (<1 month from transplantation) cardiac transplant recipients. The main finding of this study is that 12 weeks of combined ...
Bellard Elisabeth - - 2005
BACKGROUND: Sublingual nitroglycerin is advocated to sensitize the passive 70 degrees head-upright tilt test (HUTT) of patients with unexplained syncope. We hypothesized that a detailed analysis of hemodynamic responses recorded during a negative HUTT could predict the outcome to a subsequent nitroglycerin sensitized HUTT (NTG-HUTT). METHODS: Thirty-two patients (46 +/- ...
Terzi Sait - - 2005
Left atrial (LA) function is associated with left ventricular (LV) diastolic filling and cardiac output response to exercise. But the relation between LA function and exercise performance has not been adequately evaluated. The aim of this study was to investigate the relation between LA function and exercise capacity in dilated ...
Boriani Giuseppe - - 2005
In patients with heart failure and wide QRS complex, cardiac resynchronization therapy (CRT) is associated with improvement of symptoms and cardiac function. This study examined the effects of a 3-month period of CRT on left ventricular (LV) and right ventricular (RV) ejection fraction (EF) and on LV volumes, both at ...
Torregrosa Mireia - - 2005
BACKGROUND/AIMS: Liver cirrhosis induces cardiac alterations. We aimed to define these alterations and assess their reversibility after transplantation. METHODS: Cirrhotic patients (n = 40) and controls (n = 15) underwent echocardiography and stress ventriculography. Fifteen cirrhotics were reevaluated 6-12 months after transplantation. RESULTS: Cirrhotics had higher left ventricular wall thickness ...
Huot-Marchand François - - 2005
The aim of this study was to analyse the variations of stroking parameters (speed, stroke length, stroke rate, and stroke index) associated with the 200 m front crawl competitive performance improvement. Two races completed by 17 top swimmers were analysed in the 200 m freestyle final of French or European ...
Pandey Vinod V BME Group, Bio School, IIT Bombay, Powai Mumbai 400 076, India. E-mail: - - 2005
Impedance cardiography is a noninvasive technique for monitoring stroke volume, based on sensing variation in the thoracic impedance, z(t), due to blood flow. In this technique, first derivative of impedance, dz/dt, is used to calculate two parameters: ventricular ejection time and (-dz/dt)<inf>max.</inf>Respiration and motion artifacts cause base line drift in ...
Karner Ivan - - 2004
AIM: To evaluate cardiovascular consequences of combined treatment in Graves' disease patients with addition of thyroxine (LT4) to antithyroid drugs in doses sufficient to suppress serum thyrotropin (TSH) levels below normal. METHODS: Eleven premenopausal female patients who reached subnormal TSH levels (<0.3 microIU/mL) under the combined therapy were evaluated by ...
Shannahoff-Khalsa David S DS The Research Group for Mind-Body Dynamics, Institute for Nonlinear Science, University of California, San Diego, La Jolla, CA 92093-0402, USA. - - 2004
This pilot study investigated the hemodynamics of a yogic breathing technique claimed "to help eliminate and prevent heart attacks due to abnormal electrical events to the heart," and to generally "enhance performance of the central nervous system (CNS) and to help eliminate the effects of traumatic shock and stress to ...
Sundstedt M - - 2004
AIM: The objective was to assess left ventricular (LV) volumes at rest and during upright submaximal exercise in endurance athletes to see whether changes in heart volume could explain the large predicted increase in cardiac output in endurance athletes. METHOD: Contrast echocardiography was used to assess changes in LV volumes ...
de Groote P - - 2004
AIM OF THE STUDY: To analyze the effect of bisoprolol in patients with stable congestive heart failure and who tolerated beta-blockers. MATERIAL AND METHODS: Two hundred and one patients performed before and 3 months after maximal tolerated doses of bisoprolol have been reached, a clinical evaluation, an echocardiography, a radionuclide ...
Rowland T W - - 2004
AIM: Previous investigations have indicated that maximal stroke volume is the primary factor which differentiates physiological aerobic fitness (VO2max) in endurance athletes from nonathletes. Understanding the pattern of stroke volume response to progressive exercise may provide insights into the mechanisms which are responsible for this difference. METHODS: Doppler echocardiography was ...
Banerjee Anindya - - 2004
INTRODUCTION: Exercise during haemodialysis has potential benefits but may compromise cardiovascular stability. We studied its acute effects on relative blood volume (RBV) and other haemodynamic parameters. METHODS: Two groups of 10 patients were exercised submaximally using a stationary cycle during isovolaemic dialysis whilst RBV was monitored continuously. In study 1, ...
Roest A A W - - 2004
To assess with magnetic resonance imaging (MRI) cardiovascular function in response to exercise in patients after atrial correction of transposition of the great arteries (TGA). Cardiac function at rest and during submaximal exercise was assessed with MRI in 27 patients with TGA (mean (SD) age 26 (5) years) late (23 ...
Supino Phyllis G - - 2004
Previous studies have differed regarding the prognostic importance of the change (Delta) in left ventricular ejection fraction (LVEF) with exercise among patients with known or suspected coronary artery disease (CAD). Data suggest that these discrepancies may be owing to patient selection, including wide interstudy variations in the range of LVEFrest ...
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