March 17, 2007AJP Heart and Circulatory Physiology
Diastolic ventricular interactions in endurance-trained athletes during orthostatic stress
Why the study?
Does endurance training alter right and left ventricular volume responses to cardiac loading and unloading in males?
Population
16 males, comprising 8 endurance-trained and 8 normally active
Comparison
Lower-body positive and negative pressures vs Normally active males
Design
Cross-sectional
Authors
Discussion
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Implication
May indicate altered LV compliance in athletes during unloading but should not change practice; leaves open mechanisms and clinical relevance.
Structured PICO
Does endurance training alter right and left ventricular volume responses to cardiac loading and unloading in males?
P
Population
16 males, comprising 8 endurance-trained (Vo2max 65.4 +/- 5.7 ml.kg-1.min-1) and 8 normally active (Vo2max 45.1 +/- 6.0 ml.kg-1.min-1)
I
Intervention
Lower-body positive (0-60 mmHg) and negative (0 to -80 mmHg) pressures
C
Comparator
Normally active males
O
Outcome
Right ventricular (RV) cavity dimensions and left ventricular (LV) volumes assessed by echocardiographysurrogate
Endurance-trained athletes exhibit differential left ventricular volume responses to cardiac loading and unloading compared to normally active individuals, despite similar right ventricular responses, suggesting altered ventricular interactions or intrinsic compliance.
Cite This Study
Esch et al. (2007) studied this question.