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Front Cardiovasc Med. 2015 Apr 30;2:8. doi: 10.3389/fcvm.2015.00008. eCollection 2015.

Improved Right Ventricular Performance with Increased Tricuspid Annular Excursion in Athlete's Heart.

Frontiers in cardiovascular medicine

Wei Zha, Chun G Schiros, Gautam Reddy, Wei Feng, Thomas S Denney, Steven G Lloyd, Louis J Dell'Italia, Himanshu Gupta

Affiliations

  1. Department of Medical Physics, University of Wisconsin-Madison , Madison, WI , USA.
  2. Department of Medicine, University of Alabama at Birmingham , Birmingham, AL , USA.
  3. Department of Biomedical Engineering, Wayne State University , Detroit, MI , USA.
  4. Department of Electrical and Computer Engineering, Auburn University , Auburn, AL , USA.
  5. Department of Medicine, University of Alabama at Birmingham , Birmingham, AL , USA ; Birmingham Veteran Affairs Medical Center , Birmingham, AL , USA.

PMID: 26664880 PMCID: PMC4671336 DOI: 10.3389/fcvm.2015.00008

Abstract

BACKGROUND: Marathon runners (MTH) and patients with mitral regurgitation (MR) exhibit left ventricular (LV) overload, and LV geometric changes in these groups have been reported. In this study, right ventricular (RV) adaptation to chronic volume overload was evaluated in MTH and MR and normal controls together with interventricular septal remodeling and tricuspid annulus (TA) motion.

METHODS: A total of 60 age-matched subjects (including 19 MTH, 17 isolated chronic compensated MR patients, and 24 normal subjects) underwent conventional cine and tagged cardiac magnetic resonance imaging. Myocardial strain and curvature were computed on the interventricular septum and RV free wall. A dual-propagation technique was applied to construct RV volume-time curves for a single cardiac cycle. Similarly, the TA was tracked throughout the cardiac cycle to create displacement over time curve.

RESULTS: Septal curvature was significantly lower in MTH and MR compared to controls. No significant differences in RV free-wall strain or RV ejection fraction were noted among the three groups. However, longitudinal TA excursion was significantly higher in MTH compared to controls (p = 0.0061). The peak late diastolic TA velocity in MR was significantly faster than MTH (p = 0.0031) and controls (p = 0.020).

CONCLUSION: Increased TA kinetics allows for improved RV performance in MTH. Septal remodeling was observed in both MR and MTH, therefore a direct relationship of septal remodeling to TA kinetics in athlete's heart could not be elucidated in this study.

Keywords: cardiac magnetic resonance imaging; interventricular septal remodeling; marathon runners; mitral regurgitation; right ventricle strain; right ventricular function; tricuspid annulus displacement

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