SV is the volume per stroke by left ventricle, and CO is the volume of blood being pumped by the heart in the time interval of one minute [107] . CI is a vasodynamic parameter that is relating CO to body surface area [107] . All the three parameters indicate left ventricular systolic function, as LVEF does. This paper made meta-analysis of these outcomes, respectively; results showed that SFI group was better than control group in these three parameters: SV (WMD: 7.25; 95% CI [4.60, 9. E/A ratio is widely accepted as a clinical marker of diastolic HF, and E/A ratio is reduced in diastolic dysfunction [108] . The result of meta-analysis of E/A ratio was WMD: 0.15; 95% CI [0.08, 0.22], P < 0.01, which indicated that SFI better improved diastolic function of heart on HF patients Evidence-Based Complementary and Alternative Medicine 5 than conventional medicine treatment did (Supplementary Figure 8) .