求翻译：结果：观察组指标RR和HR降低明显，SpO2和SV1升高明显，差异显著（P＜0.05），有统计学意义；C1降低不明显，差异不显著（P＞0.05），没有统计学意义。结论：经鼻持续呼吸道正压可以改善肺炎并心衰患儿的心功能，降低呼吸频率和心率，提高左心室每搏输出量指数，但对心指数的影响不明显。是什么意思？

Results: observation of RR group index and HR to reduce significantly, SpO2 and elevated SV1 visible, significant difference (P<0.05), a statistically; C1 reducing is not obvious, difference is not significant (P>0.05), was not statistically significant. Conclusion: nasal continuous positive airway pressure can improve heart function in children with pneumonia complicated by heart failure, reducing the respiratory rate and heart rate, increasing left ventricular stroke volume index, but the effect on cardiac index is not obvious.