Effects of exercise countermeasure on myocardial contractility measured by 4D speckle tracking during a 21-day head-down bed rest
| Autor: | Enrico G. Caiani, D. K. Greaves, Kathryn Zuj, P. Arbeille, L. Guillon |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Male
medicine.medical_specialty Supine position Head-down tilt bed rest Physiology Cardiac contractility Cardiac strain Echocardiography Resistive exercise Speckle tracking Ultrasound medicine.medical_treatment Bed rest Head-Down Tilt Contractility 03 medical and health sciences Speckle pattern 0302 clinical medicine Diastole Physiology (medical) Internal medicine medicine Humans Orthopedics and Sports Medicine Exercise business.industry Myocardium Public Health Environmental and Occupational Health Heart 030229 sport sciences General Medicine eye diseases Muscle atrophy Exercise Therapy medicine.anatomical_structure Ventricle Cardiology End-diastolic volume medicine.symptom Weightlessness Countermeasures business Bed Rest 030217 neurology & neurosurgery Muscle Contraction |
| Zdroj: | European Journal of Applied Physiology. 119:2477-2486 |
| ISSN: | 1439-6327 1439-6319 |
| Popis: | To evaluate functional myocardial contractility after 21 days of head-down bed rest (HDBR) in sedentary control (CON) or with a resistive vibration exercise (RVE) countermeasure (CM) applied, by using 4D echocardiographic (4D echo) imaging and speckle tracking strain quantification. Twelve volunteers were enrolled in a crossover HDBR design, and 4D echo was performed in supine position (REST) at BDC-2 and at R + 2, and in − 6° HDT at day 18, and during the first and the last minute of the 80° head-up step of tilt test performed at both BDC-2 and R + 2. Radial (Rad-Str), longitudinal (Lg-Str) and twist (Tw-Str) strains were measured by 4D speckle tracking, as well as left ventricle diastolic volume (LVDV) and mass (LVmass). On HDT 18: in the CON group, LVDV and LVmass were reduced (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink