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. Author manuscript; available in PMC: 2016 Mar 15.
Published in final edited form as: Circulation. 2014 Dec 31;131(6):522–524. doi: 10.1161/CIRCULATIONAHA.114.014420

Figure 2.

Figure 2

Relationship of capillary density (capillary-to-fiber ratio) with peak exercise O2 uptake (V˙o2), an objective measure of exercise capacity, in older patients with HFPEF (■) and age-matched control subjects (▲). From Kitzman et al9 with permission.