Biventricular Response of the Heart to Endurance Exercise Training in Previously Untrained Subjects.
Background Functional adaptation of the heart to regular strenuous exercise has not been fully elucidated yet, with different patterns of alterations being reported. We evaluated the effect of endurance exercise training ( EET) on left ( LV) and right ventricular ( RV) mechanics in amateur individua...
| Publicado en: | Echocardiography Vol. 32; no. 5; pp. 779 - 787 |
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| Autores principales: | , , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Wiley-Blackwell
May2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=103789428&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 103789428 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 07422822 GSE jtl: Echocardiography issn: 07422822 maglogo: Y pubinfo: dt: May2015 vid: 32 iid: 5 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 103789428 102202640 10.1111/echo.12737 NLM25201707 103789428 ppf: 779 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Biventricular Response of the Heart to Endurance Exercise Training in Previously Untrained Subjects. aug: au: Rojek, Aleksandra Bialy, Dariusz Przewlocka-Kosmala, Monika Negrusz-Kawecka, Marta Mysiak, Andrzej Kosmala, Wojciech affil: Cardiology Department, Medical University sug: subj: Cardiovascular System Physiology Exercise Physiology Physical Endurance Echocardiography Methods Human Descriptive Statistics Adult Prospective Studies Female Intrarater Reliability Interrater Reliability Adult: 19-44 years Female ab: Background Functional adaptation of the heart to regular strenuous exercise has not been fully elucidated yet, with different patterns of alterations being reported. We evaluated the effect of endurance exercise training ( EET) on left ( LV) and right ventricular ( RV) mechanics in amateur individuals preparing for triathlon competitions. Methods Twenty-one subjects aged 33 ± 6 years underwent conventional and speckle tracking echocardiography at rest before and after a high-intensity (12.3 ± 1.0 h/week) 12-month EET. Results At follow-up, in addition to the improvement in LV diastolic parameters, a significant decrease in longitudinal (26.0 ± 3.3% vs. 24.3 ± 3.2%, P < 0.04), circumferential (24.3 ±4.3% vs. 20.1 ± 3.8%, P < 0.002), and radial strains (46.8 ± 18.3% vs. 37.8 ± 12.9%, P < 0.03), and rotation (9.7 ± 4.8% vs. 7.1 ± 4.0 deg, P < 0.04) was demonstrated at the apex, whereas the LV base was found to show an increase in rotation (−3.9 ± 2.8% vs. −5.9 ± 1.8 deg, P < 0.01). Overall hemodynamic effectiveness of the LV was preserved, as evidenced by the unchanged ejection fraction, cardiac output, twist, and torsion. RV systolic function as assessed by strain was significantly reduced with EET (28.1 ± 6.7% vs. 23.7 ± 8.6%, P < 0.03). Conclusions EET modifies both LV and RV performance at rest in previously untrained subjects. The true nature of these changes (adaptive or maladaptive) is unclear, but the hypothesis of different responses of the LV apex and base, with the reduction in contractility of the former and increase in rotation of the latter, representing a protective mechanism that reduces myocardial stress might be considered. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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