Currently, we have limited understanding of the pathophysiological basis of HF in patients with preserved left ventricular systolic function and management techniques to prevent it.
目前，我们限于对心力衰竭病理生理的基础上来保护左心室收缩功能和利用科技来预防心衰。
DHF occurs when signs and symptoms of heart failure are present but left ventricular systolic function is preserved (i. e. ejection fraction greater than 45 percent).
DHF是指有心衰的症状和体征而左室收缩功能正常(射血分数大于45%)。
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