• English
    • Welsh
  • English 
    • English
    • Welsh
  • Login
Search DSpace:
  • Home
  • Research at Cardiff Met
  • Library Services
  • Contact Us
View item 
  • DSpace home
  • Cardiff School of Sport and Health Sciences
  • Taught Degrees (Sport and Health Sciences)
  • Undergraduate Degrees (Sport)
  • View item
  • DSpace home
  • Cardiff School of Sport and Health Sciences
  • Taught Degrees (Sport and Health Sciences)
  • Undergraduate Degrees (Sport)
  • View item
JavaScript is disabled for your browser. Some features of this site may not work without it.

An Assessment of the Relationship Between Regional Mechanical Myocardial Function and the Electrocardiogram

Thumbnail
View/open
Foxwell_Ben_ST20001595.docx.pdf (817.8Kb)
Author
Foxwell, Ben
Date
2014
Type
Thesis
Publisher
Cardiff Metropolitan University
Metadata
Show full item record
Abstract
It has previously been established that the left ventricle (LV) of the myocardium counter-rotates around its long axis on contraction. The apex and base rotate in opposite directions to create a wringing motion, resulting in LV twist. LV twist has been shown to vary with aerobic training status at rest. However the mechanisms that underpin this mechanical difference have yet been established, and the study of LV mechanics during exercise have seldom been explored. It has been previously suggested that neural activation could be responsible for this mechanical variation. In this study, LV twist mechanics and LV regional neural activity were assessed in 14 male university sports students (age: 20±1 years). Individuals firstly conducted a 2 max test, and were separated into two fitness groups post hoc by the median. Individuals were then examined at rest and during exercise (40% peak 2 power). At rest and during exercise, there were no significant differences in LV twist mechanics between fitness groups (P>0.05). However both basal and apical rotation, and basal and apical untwisting velocities were significantly higher from rest to exercise within both groups (P<0.05). There were no significant differences observed in neural activity at myocardial base and apex between fitness groups, or between rest and exercise (P>0.05). No significant correlations were found between myocardial mechanics and neural function in either group at rest or exercise (P>0.05). It was concluded that neural activity per se, is not an indicator of mechanical myocardial activity at base and apex, although there was some evidence to suggest a link may exist between cardiac mechanics and neural function. The findings suggest that the differences in LV mechanics could be caused by other underlying factors, one of these could be molecular adaptations
URI
http://hdl.handle.net/10369/6180
Description
DEGREE OF BACHELOR OF SCIENCE (HONOURS) SPORT AND EXERCISE SCIENCE
Collections
  • Undergraduate Degrees (Sport) [1420]

Related items

Showing items related by title, author, subject and abstract.

  • Thumbnail

    The influence of habitual exercise on central haemodynamics and peripheral blood pressure regulation in normotensive middle-aged men 

    Wakeham, Denis (Cardiff Metropolitan University, 2020)
    Central (aortic) haemodynamics change markedly with age, as aortic stiffness and systolic pressure augmentation increase thereby elevating aortic blood pressure. Furthermore, the autonomic regulation of vascular sympathetic ...
  • Thumbnail

    Baroreflex control of sympathetic vasomotor activity and resting arterial pressure at high altitude: insight from Lowlanders and Sherpa 

    Simpson, Lydia; Busch, Stephen; Oliver, Samuel; Ainslie, Philip; Stembridge, Mike; Steinback, Craig; Moore, Jonathan (Wiley, 2019-03-20)
    Exposure to high altitude (HA) is characterized by heightened muscle sympathetic neural activity (MSNA); however, the effect on arterial baroreflex control of MSNA is unknown. Furthermore, arterial baroreflex control at ...
  • Thumbnail

    The impact of an 8-week green-exercise programme on systemic health, and on markers associated with cardiovascular disease risk. 

    Thompson, Jane Elizabeth S. (Cardiff Metropolitan University, 2014)
    The current PhD project aimed to carry out an investigation into the effect of green-exercise programmes on markers of health related to cardiovascular risk. These markers derived from three diverse areas; blood-borne ...

Browse

DSpace at Cardiff MetCommunities & CollectionsBy issue dateAuthorsTitlesSubjectsThis collectionBy issue dateAuthorsTitlesSubjects

My Account

Login

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

DSpace software copyright © 2002-2015  DuraSpace
Contact us | Send feedback | Administrator