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Figure 3 Summary physical component scales (PCS) in patients with different angina classifications. Higher values indicate improved quality of life. Values are given as mean ± SD. *Statistical significance between patients classified as New York Heart Association (NYHA) functional class II and class III and between NYHA functional class III and class IV. Lined bar = all; shaded bar = transmyocardial revascularization with CO₂ laser; black bar = medical treatment. *p < 0.01.