Population
7 patients with "pure" mitral stenosis
Design
Cross-sectional
Key result
In patients with pure mitral stenosis, low maximal oxygen uptake defined the reduction in stroke volume, while other circulatory responses were normal with respect to relative oxygen uptake.
Authors
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May inform exercise testing interpretation in mitral stenosis; leaves open clinical utility and requires prospective validation.
Observational (n=7)
In patients with pure mitral stenosis, the reduction in stroke volume is defined by low maximal oxygen uptake, whereas other circulatory responses remain normal when adjusted for relative oxygen uptake.
Blackmon et al. (1967) conducted an observational in Mitral stenosis (n=7). Mild through maximal upright exercise was evaluated on Circulatory and respiratory adjustments (cardiac output, A-V oxygen difference, heart rate, blood lactate, ventilation). In patients with pure mitral stenosis, low maximal oxygen uptake defined the reduction in stroke volume, while other circulatory responses were normal with respect to relative oxygen uptake.