- Poster presentation
- Open Access
Atrial and ventricular kinetic energy is higher in athletes compared to healthy controls and contributes to improve diastolic filling of the ventricles
© Steding-Ehrenborg et al; licensee BioMed Central Ltd. 2015
- Published: 3 February 2015
- Left Atrium
- Left Ventricular Mass
- Endurance Athlete
- Early Diastole
- Ventricular Systole
The athlete's heart is physiologically enlarged with an extraordinary ability to pump large volumes of blood at high heart rates. We hypothesized that efficient filling and emptying is related to the kinetic energy (KE) of intra-cardiac blood. Therefore, the aim of this study was to investigate variations in KE in the four chambers of the heart over the cardiac cycle and compare endurance athletes to healthy controls.
Fourteen athletes (8 women) and 14 controls (6 women) underwent CMR with a 5-channel cardiac coil in a 1.5T Philips Achieva or 3T Philips Intera (Best, The Netherlands). Three-dimensional time-resolved phase contrast flow (4D PC) was performed using a box covering the whole heart. Typical imaging parameters were: TE/TR 3/5ms, α 8°, SENSE factor 2, velocity encoding 100cm/s, spatial resolution 3x3x3mm, acquired temporal resolution of 40ms with a reconstructed temporal resolution of 25ms. Kinetic energy was calculated as KE=0.5mv2 and rotational KE of the atria was calculated as KE=0.5mv α 2 where m is mass, v is velocity and v α is the angular velocity about the rotational axis.
Kinetic energy varies over the cardiac cycle in a similar way in athletes and controls although athletes have higher peak values. A large LVM was correlated to a high early diastolic peak of the left ventricle, indicating an improved diastolic suction in athletes at rest that may become even more significant during exercise.
This study was funded by World Village of Women Sports and the Swedish Centre for Sports Science.
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