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In order to learn more about stretch reflex behaviour of triceps surae, normal human subjects sat in a chair with one foot on a platform attached to a torque motor that produced phasic dorsiflexion displacements on the ankle. EMG activity was recorded from triceps surae and responses were obtained for various conditions. When the subjects's foot was… (More)
BACKGROUND Retrospective single-center studies have shown that measures of mechanical dyssynchrony before cardiac resynchronization therapy (CRT), or acute changes after CRT, predict response better than QRS duration. The Prospective Minnesota Study of Echocardiographic/TDI in Cardiac Resynchronization Therapy (PROMISE-CRT) study was a prospective… (More)
BACKGROUND The aims of this study were to assess the ability of several echo measures of dyssynchrony to predict CRT response and to characterize the global effect of CRT. HYPOTHESIS We hypothesized that after CRT there would be significant reductions in mechanical dyssynchrony in all 3 orthogonal planes of cardiac motion and that those patients with… (More)
OBJECTIVE The objective of this study was to conduct a meta-analysis of literature examining rates of return of spontaneous circulation from load-distributing band and piston-driven chest compression devices as compared with manual cardiopulmonary resuscitation. DATA SOURCES Searches were conducted in MEDLINE, the ClinicalTrials.gov registry, and… (More)
Calciphylaxis is a rare manifestation of abnormal calcium metabolism seen in some patients with renal disease. We describe the transesophageal echocardiographic (TEE) findings in a patient with calciphylaxis. These findings included calcification of ascending aorta and aortic valve. TEE was normal before the development of calciphylaxis.
PURPOSE Cardiovascular disease is the leading noncancer cause of death among survivors of childhood cancer. Ejection fraction (EF) and fractional shortening (FS) are common echocardiographic measures of cardiac function, but newer imaging modalities may provide additional information about preclinical disease. This study aimed to evaluate these modalities… (More)
AIM Many sports are played intermittently in bursts of high, moderate, and low intensity activity. The pattern of exercise intensity has been assessed from heart rate (HR) and time motion analysis and few data are available based on assessment of exercise intensity by means of direct measurement of oxygen uptake. The aim of this study was to directly assess… (More)
OBJECTIVE The objective was to examine cardiovascular autonomic (cANS) function and its potential relationships with leptin resistance, insulin resistance, oxidative stress, and inflammation in a pediatric sample with varying levels of obesity. RESEARCH METHODS AND PROCEDURES Participants were normal-weight (NW; BMI <85th percentile, 6 male, 4 female),… (More)
Involuntary movements in a patient with Sydenham's chorea were usually characterised by bursts of EMG activity lasting more than 100 ms, occurring asynchronously in antagonist muscles. The "hung-up" knee jerk was a choreic movement induced by the tendon tap. Exaggerated voluntary movements were produced with EMG burst longer than normal.
The physiological responses of high (HF) and low fit (LF) individuals at given perceived exercise intensities were compared to ranges provided by the American College of Sports Medicine (ACSM). Participants were 7 LFand 8 HF men between the ages of 22 and 26 years. All participants performed a maximum oxygen uptake and lactate threshold test and two 15-min… (More)