Myocardial adaptation to short-term high-intensity exercise in highly trained athletes.
We aimed to clarify the myocardial adaptation to short-term high-intensity exercise among trained athletes. We screened 17 participants in the 2004 World Indoor Rowing Championships before and after a 2000-m sprint. Echocardiography included standard measurements and tissue Doppler-derived strain (epsilon), strain rate, and 2-dimensionally derived speckle-tracking imaging for left ventricular (LV) torsion. LV volumes and ejection fraction were unchanged after exercise. There was a reduction in early and an increase in late diastolic filling velocities and a decrease in the flow propagation velocity. Annular systolic velocities, slope of the systolic acceleration, septal and lateral epsilon, and speckle tracking-derived torsion were increased. The increased LV torsion was a result of increased basal and apical rotation. Right ventricular apical epsilon decreased. In conclusion, maximal intensity short-duration exercise was associated with attenuation of LV diastolic function, augmentation of LV systolic function, and a reduction in apical right ventricular contractility.
Neilan
Tomas G
TG
Cardiac Ultrasound Laboratory, Division of Cardiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02115-2696, USA.
Ton-Nu
Thanh-Thao
TT
Jassal
Davinder S
DS
Popovic
Zoran B
ZB
Douglas
Pamela S
PS
Halpern
Elkan F
EF
Marshall
Jane E
JE
Thomas
James D
JD
Picard
Michael H
MH
Yoerger
Danita M
DM
Wood
Malissa J
MJ
D000222:Adaptation, Physiological / Q000502:physiology; D000328:Adult; D001824:Body Constitution / Q000502:physiology; D015150:Echocardiography, Doppler; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010807:Physical Endurance / Q000502:physiology*; D005082:Physical Exertion / Q000502:physiology*; D012767:Ships; D013177:Sports / Q000502:physiology*; D016276:Ventricular Function / Q000502:physiology*