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肥胖对肺动脉高压死亡率的影响

时间:2022-06-11 22:42:26 皮肤科 我要投稿

肥胖对肺动脉高压死亡率的影响

背景

肥胖会增加肺动脉收缩压(PASP),右心房压力(RAP),阻塞性睡眠呼吸暂停综合征(OSA)的发病率,降低心指数(CI)。多项研究表明,伴收缩性和舒张性心功能不全的肥胖患者与非肥胖者相比,死亡率增高,但有关肥胖对PAH患者死亡率的影响尚缺乏证据支持。

方法

回顾性分析从1996年至2010年收住的肺高压患者241例,按体重指数分为两组:非肥胖组(BMI <30n = 115)和肥胖组(BMI> 30n = 126)。研究变量包括年龄、RAPPASPCI,分别计算两组在1年末、2年末、3年末的全因的死亡率。

结果

非肥胖组的平均年龄比肥胖组小(62.0±15.39 VS 69.38±15.98P <0.001),其它基线特征变量如RAPPASPCI等两组无显著性差异。肥胖组与非肥胖组相比,在1年末、2年末、3年末的全因死亡率分别为(13.7 VS 8.1%,P = 0.04),(25.8 VS 24%,P = 0.56),(31.7 VS 49.8%,P = 0.002)。

结论

研究表明,肥胖患者与非肥胖患者相比,在确诊PAH第一年死亡率较高,第二年死亡率两者相当,但在第三年死亡率则明显降低,关于发生这种变化趋势的原因尚不清楚,需进一步的大规模前瞻性研究来进一步明确。

英文原文:

Effect of Obesity on Mortality in Pulmonary Arterial Hypertension: A Retrospective Analysis

Background

 Obesity increases Pulmonary Artery Systolic Pressure (PASP), right atrial pressure (RAP) incidence of obstructive sleep apnea (OSA) and decreases Cardiac index (CI). Multiple studies have shown that obese patients with established systolic or diastolic heart failure have lower mortality rates than non-obese patients. There is no available evidence regarding the effect of obesity on mortality in patients with PAH.
    Methods

Retrospective data were collected from 1996 to 2010. Patients are divided into two groups: non-obese group (n=115) with BMI<30 and obese group (n=126) with BMI>30. Variables studied included age, RAP, PASP & CI. All cause mortality at 1, 2 and 3 years are calculated for both groups.
    Results

Mean age in the Non-obese group is 62.0±15.39 vs 69.38±15.98 (p<0.001) in the obese group. There was no significant difference in the rest of the variables including RAP, PASP and CI. Mortality rates at 1,2 and 3 years in obese and non-obese groups were 13.7% vs 8.1% p=0.04, 25.8% vs 24% p=0.56 and 31.7% vs 49.8% p=0.002 respectively.
    Conclusion

Our study showed that obesity is associated with higher mortality in PAH patients in the 1st year after diagnosis. However, this trend reverses afterward, with equal mortality 2 years after diagnosis and significantly less mortality in obese patients after 3 years of diagnosis. The cause for this change in mortality after the 1st years is unclear. Large prospective studies are required to confirm these findings and to examine the causes leading to them.