Conclusion Persistent low flow oxygen therapy can significantly reduce the heart rate and improve the clinical symptoms of senile chronic congestive heart failure.
结论持续低流量吸氧可显著降低慢性充血性心衰患者的心率，改善心衰临床症状。
Objective to observe the therapeutic efficacy and tolerance of small-dose metoprolol on senile patients with chronic congestive heart failure (CCHF).
目的：为观察小剂量美托洛尔治疗老年慢性充血性心力衰竭(CC HF)的疗效及耐受性。
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