J Cardiovasc Ultrasound.  2014 Dec;22(4):196-204. 10.4250/jcu.2014.22.4.196.

Endurance and Strength Athlete's Heart: Analysis of Myocardial Deformation by Speckle Tracking Echocardiography

• Santoro A
• Alvino F
• Antonelli
• Caputo M
• Padeletti
• Lisi M
• Mondillo S

• KMID: 1980423
• DOI: http://doi.org/10.4250/jcu.2014.22.4.196

Abstract

BACKGROUND
Intensive training induces two morphological myocardial typologies of athlete's heart. Endurance training (ET) induces eccentric remodeling, bradycardia and better diastolic filling. Strength training (ST) determines concentric chamber remodelling maintaining a normal heart rate (HR). Aim of the study was to compare ET and ST athletes' heart using speckle tracking echocardiography (STE).
METHODS
33 professional ET, 36 ST athletes, and 17 healthy controls (CT) were enrolled. All subjects underwent standard transthoracic echocardiography at rest and STE.
RESULTS
In ET group, HR was lower than ST group and CT group (p < 0.001; p < 0.01). ET group had higher E/A ratio than ST group and CT group (p < 0.01; p < 0.001). The left ventricular apical circumferential strain in ET group was lower than ST group and CT group (-21.6 +/- 4.1% vs. -26.8 +/- 7.7%, p < 0.05; vs. -27.8 +/- 5.6%, p < 0.01). ET group had lower left ventricular twist (LVT) and untwisting (UTW) than ST group (6.2 +/- 0.1degrees vs. 12.0 +/- 0.1degrees, p < 0.01; -67.3 +/- 22.9degrees/s vs. -122.5 +/- 52.8degrees/s, p < 0.01) and CT group (10.0 +/- 0.1degrees, p < 0.01; -103.3 +/- 29.3degrees/s, p < 0.01). The univariate analysis showed significant correlation between E/A ratio and HR (r = -0.54; p < 0.001), LVT (r = -0.45; p < 0.01), UTW (r = 0.24; p < 0.05). At the multivariate analysis only HR was confirmed as independent predictor of diastolic function in all groups (Beta -0.52; p < 0.001).
CONCLUSION
In ET there was a better global systolic and diastolic functional reserve at rest observed with strain analysis and it maybe depended on autonomic modulation.

Keyword

Athlete's heart; Endurance training; Strength training; Speckle tracking echocardiography; Twisting

MeSH Terms

Athletes
Bradycardia
Echocardiography*
Heart Rate
Heart*
Humans
Multivariate Analysis
Resistance Training

Figure

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  Fig. 1 ET and ST athletes tissue Doppler imaging pattern. ET: endurance training, ST: strength training.

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  Fig. 2 ET and ST athletes speckle tracking echocardiography pattern. ET: endurance training, LVT: left ventricular twist, ST: strength training.

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