التفاصيل البيبلوغرافية
| العنوان: |
Preserved Left Atrial Mechanics Following a 5-h Laboratory Triathlon in Euhydrated Athletes |
| المؤلفون: |
Sareban, Mahdi, Zügel, David, Hartveg, Paul, Zügel, Martina, Gary, Thomas, Niebauer, Josef, Steinacker, Jürgen, Treff, Gunnar |
| المصدر: |
International Journal of Sports Medicine ; volume 40, issue 02, page 88-94 ; ISSN 0172-4622 1439-3964 |
| بيانات النشر: |
Georg Thieme Verlag KG |
| سنة النشر: |
2019 |
| الوصف: |
The purpose of this study was to investigate echocardiographic changes in left ventricular (LV) diastolic filling and left atrial (LA) strain mechanics following prolonged exercise. Ten male triathletes completed a 60-min swim, 180-min bike exercise, and a 60-min all-out run in a laboratory environment. Special attention was paid to prevent dehydration and energy deficit during the exercise protocol. All participants underwent comprehensive echocardiographic analyses of Doppler- and volumetric-derived LV diastolic filling indices and novel speckle-tracking echocardiography (STE)-derived LA strain indices. LV stroke volume (pre: 108.0±15.9 vs. post: 88.8±19.0 mL; p=0.03) and LA passive emptying volume (pre: 31.2±7.5 vs. post: 22.4±9.8 mL; p=0.05) were significantly reduced following the exercise protocol. Of the STE-derived indices of LA function, reservoir and conduit strain did not change significantly, while there was a trend towards enhanced contraction strain (pre: 15.1±3.8 vs. post: 19.4±4.8%; p=0.07). Resting heart rate was significantly higher post-exercise (53.1±5.0 vs. 81.9±16.9 bpm; p<0.001) and its change correlated strongly with depression of Doppler-derived ratio of early to late ventricular filling velocities (r=0.74, p=0.01) and reduction of LA passive emptying volume (r=0.86, p=0.01). Following prolonged exercise, LV stroke volume was reduced due to heart rate related reduction in LA passive emptying volume whereas global LA strain mechanics were not compromised in this study. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| DOI: |
10.1055/a-0750-5780 |
| DOI: |
10.1055/a-0750-5780.pdf |
| الإتاحة: |
https://doi.org/10.1055/a-0750-5780Test |
| رقم الانضمام: |
edsbas.E4A5935E |
| قاعدة البيانات: |
BASE |
