CLINICAL STUDY: CARDIAC MAGNETIC RESONANCE STUDIES
Athlete’s heart
Right and left ventricular mass and function in male endurance athletes and untrained individuals determined by magnetic resonance imaging
J.ürgen Scharhag, MD*,*,
G.ünther Schneider, MD ,
Axel Urhausen, MD*,
Veneta Rochette*,
Bernhard Kramann, MD and
Wilfried Kindermann, MD*
* Institute of Sports and Preventive Medicine, Saarbrücken, Germany
Clinic of Radiology, Department of Radiodiagnostics, University of Saarland, Saarbrücken, Germany
Manuscript received March 13, 2002;
revised manuscript received June 13, 2002,
accepted July 17, 2002.
* Reprint requests and correspondence: Dr. Jürgen Scharhag, Institute of Sports and Preventive Medicine, University of Saarland, campus, Building 39.1, 66123 Saarbrücken, Germany.
j.scharhag{at}mx.uni-saarland.de
OBJECTIVES: Athlete’s heart represents a structural and functional adaptation to regular endurance exercise.
BACKGROUND: While left ventricular (LV) hypertrophy of the athlete’s heart has been examined in many studies, the extent of right ventricular (RV) hypertrophy is still uncertain because of its complex shape and trabecular structure. To examine RV hypertrophy, we used magnetic resonance imaging (MRI) and hypothesized that athlete’s heart is characterized by similar LV and RV hypertrophy.
METHODS: The LV and RV mass, volume, and function in 21 male endurance athletes (A) (27 ± 4 years; 70 ± 8 kg; 178 ± 7 cm; maximal oxygen uptake [VO2max]: 68 ± 5 ml/min per kg) and 21 pair-matched untrained control subjects (C) (26 ± 3 years; 71 ± 9 kg; 178 ± 6 cm; VO2max: 42 ± 6 ml/min per kg) were analyzed by MRI (Magnetom Vision 1.5T, Siemens, Erlangen, Germany).
RESULTS: Left ventricular masses (A: 200 ± 20 g; C: 148 ± 17 g) and RV masses (A: 77 ± 10 g; C: 56 ± 8 g) differed significantly between the groups (p < 0.001). The LV and RV end-diastolic volumes (EDV) (LV-EDV 167 ± 28 ml [A]; 125 ± 16 ml [C]; RV-EDV 160 ± 26 ml [A]; 128 ± 10 ml [C]), and stroke volumes (SV) (LV-SV: 99 ± 18 ml [A], 74 ± 11 ml [C]; RV-SV: 102 ± 18 ml [A], 79 ± 8 ml [C]) were significantly different between the athletes and control subjects (p < 0.001), whereas ejection fractions (EF) (LV-EF: 59 ± 3% [A]; 59 ± 6% [C]; RV-EF: 63 ± 3% [A], 62 ± 3% [C]) and LV-to-RV ratios were similar for both groups (LV-to-RV mass: 2.6 ± 0.2 [A], 2.6 ± 0.3 [C]; LV-to-RV EDV: 1.05 ± 0.14 [A], 0.99 ± 0.14 [C]; LV-to-RV SV: 0.98 ± 0.17 [A], 0.95 ± 0.17 [C]; LV-to-RV EF: 0.93 ± 0.07 [A], 0.96 ± 0.10 [C]).
CONCLUSIONS: Regular and extensive endurance training results in similar changes in LV and RV mass, volume, and function in endurance athletes. This leads to the conclusion that the athlete’s heart is a balanced enlarged heart.
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Abbreviations and Acronyms
| | BSA | | body surface area | | EDD | | end-diastolic diameter | | EDV | | end-diastolic volume | | EF | | ejection fraction | | ESV | | end-systolic volume | | LV | | left ventricle/ventricular | | MRI | | magnetic resonance imaging | | RV | | right ventricle/ventricular | | SV | | stroke volume | | VO2max | | maximal oxygen uptake |
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