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FIGURE 2. Acetate clearance rate k2, a measure of MVO2 rate (A); coefficient of variation of k2 between myocardial walls (B); SVI (C); cardiac efficiency in patients with severe heart failure and LBBB (n = 16) at baseline, after 4 mo, and after 13 mo of CRT (D). Values are mean ± SD. *P < 0.05 vs. 4 mo and 13 mo of CRT. Dotted horizontal line indicates mean value of corresponding parameter of comparison group with mild heart failure patients without LBBB (n = 13) and dashed lines indicate mean ± SD.
