Case report on PWC of a competitive cyclist before and after heart transplant
Keywords
Case ReportsAdult
Bicycling/physiology
Competitive Behavior
Exercise Test
Exercise Tolerance/physiology
Heart Rate/physiology
Heart Transplantation/rehabilitation
Humans
Life Style
Male
Myocardial Infarction/surgery
Oxygen Consumption/physiology
Physical Education and Training
Physical Endurance/physiology
Physical Fitness/physiology
Full record
Show full item recordAbstract
Click on the DOI link below to access the article (may not be free).It has been well documented that for heart transplant recipients (HTR), posttransplantation physical work capacity (PWC) normally does not exceed 60% of the value for healthy age-matched controls. Few, if any, studies have undertaken posttransplantation PWC measurements of well-conditioned individuals (i.e., PWC>300 W).
peer reviewed
Date
2012-03-14Type
ArticleIdentifier
oai:soar.wichita.edu:10057/487017805072
8005433
00005768-200709000-00001
Medicine and science in sports and exercise. 2007 Sep; 39(9): 1447-51.
0195-9131
http://dx.doi.org/10.1249/mss.0b013e318074d3d7
http://hdl.handle.net/10057/4870
Copyright/License
Copyright © 2007 The American College of Sports MedicineCollections
Related items
Showing items related by title, author, creator and subject.
-
The effect of repetition lag on electrophysiological and haemodynamic correlates of visual object priming.Henson R, Rylands AJ, Ross E, Vuilleumeir P, Rugg M. (2004-04)The modulation of repetition effects by the lag between first and second presentations of a visual object during a speeded semantic judgment task was examined using both scalp event-related potentials (ERPs) and event-related functional magnetic resonance imaging (efMRI). Four levels of lag were used within a single session, from zero to one, to tens of intervening stimuli, and which allowed partial separation of the effects of interference from the effects of time. Reaction times (RTs) showed that the magnitude of repetition priming decreased as lag increased. The ERP data showed two distinct effects of repetition, one between 150 and 300 ms post stimulus and another between 400 and 600 ms. The magnitude of both effects, particularly the earlier one, decreased as lag increased. The fMRI data showed a decrease in the haemodynamic response associated with repetition in several inferior occipitotemporal regions, the magnitude of which also typically decreased as lag increased. In general, and contrary to expectations, lag appeared to have mainly quantitative effects on the three types of dependent variable: there was little evidence for qualitative differences in the neural correlates of repetition effects at different lags.
-
Visuospatial attention: how to measure effects of infrequent, unattended events in a blocked stimulus designinfo:eu-repo/classification/ddc/610; Giessing, C.; Thiel, C. M.; Stephan, K. E.; Rösler, F.; Fink, G. R. (Academic Press, 2004)This fMRI study investigates the differences between a blocked and event-related analysis in a cued target detection task, the so-called Posner paradigm, using a hybrid design. Validly and invalidly cued trials were presented intermingled in different blocks containing 50%, 75%, or 100% valid trials. Four analyses were conducted: (i) an event-related analysis comparing invalid and valid trials, (ii) a blocked analysis comparing blocks with 50% valid and invalid trials to blocks with 100% valid trials, (iii) a blocked analysis detecting differences between block models when modeled as epochs or chains of events, and (iv) a blocked analysis that modeled blocks as chains of events to scale regressors equally to the event-related analysis. Irrespective of the type of analysis (blocked or event related), significant activation of the right intraparietal sulcus was observed. A larger cluster size was evident in the blocked analysis, which can be attributed to higher efficiency. In addition to this common right parietal activation, the event-related analysis revealed activations in right superior parietal cortex and left intraparietal sulcus. In contrast, the blocked analysis yielded additional activity in the right occipitoparietal junction. No influences of the block model (epoch versus chain of events) were found in regions activated in the blocked or event-related analysis, respectively. In summary, using a hybrid design and both event-related and blocked analysis techniques, we show both sustained and transient neural processes underlying reorienting of visuospatial attention.
-
Recalling spatial information as a component of recently and remotely acquired episodic or semantic memories: An fMRI studyMayes, Andrew R.; Montaldi, Daniela; Spencer, Tom J.; Roberts, Neil (2004-07)Activations produced by the recall of episodic and semantic memories differing in spatial content and age were examined. Recall of recent episodic memories with differing spatial content activated the medial temporal lobes and the retrosplenial-posterior cingulate cortex-precuneus complex more than recall of recent semantic memories with similarly differing spatial content. Some of these differences related to the amount of spatial information recalled because spatially richer recent memories, regardless of whether they were episodic or semantic, activated the right posterior parahippocampal cortex, precuneus, and posterior parietal cortex more. This spatial effect was found to be independent of memory age for semantic memories, although some episodic-semantic memory differences, including one in the left hippocampus, were not age independent. Episodic-semantic memory recall activation differences are therefore probably a function of the amount recalled, memory age, and what is recalled, particularly with respect to spatial information.