2 results
Relationship between syncopal symptoms and head-up tilt test modes
- Shuo Wang, Yali Peng, Yuwen Wang, Fang Li, Yi Xu, Huifen Zheng, Heli Yuan, Chunyan Hu, Donglei Liao, Hong Cai, Juan Zhang, Wen Li, Yiyi Ding, Wenhua Zhang, Xiaohong Xue, Xiaoyan Liu, Liping Zhu, Deyu Liu, Meihua Kang, Liping Liu, Weihong Chu, Xiaoming Li, Xuemei Luo, Runmei Zou, Cheng Wang
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- Journal:
- Cardiology in the Young , First View
- Published online by Cambridge University Press:
- 05 April 2024, pp. 1-6
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Objective:
Head-up tilt test (HUTT) is an important tool in the diagnosis of pediatric vasovagal syncope. This research will explore the relationship between syncopal symptoms and HUTT modes in pediatric vasovagal syncope.
Methods:A retrospective analysis was performed on the clinical data of 2513 children aged 3–18 years, who were diagnosed with vasovagal syncope, from Jan. 2001 to Dec. 2021 due to unexplained syncope or pre-syncope. The average age was 11.76 ± 2.83 years, including 1124 males and 1389 females. The patients were divided into the basic head-up tilt test (BHUT) group (596 patients) and the sublingual nitroglycerine head-up tilt test (SNHUT) group (1917 patients) according to the mode of positive HUTT at the time of confirmed pediatric vasovagal syncope.
Results:(1) Baseline characteristics: Age, height, weight, heart rate (HR), systolic blood pressure (SBP), diastolic blood pressure (DBP), and composition ratio of syncope at baseline status were higher in the BHUT group than in the SNHUT group (all P < 0.05). (2) Univariate analysis: Age, height, weight, HR, SBP, DBP, and syncope were potential risk factors for BHUT positive (all P < 0.05). (3) Multivariate analysis: syncope was an independent risk factor for BHUT positive, with a probability increase of 121% compared to pre-syncope (P<0.001).
Conclusion:The probability of BHUT positivity was significantly higher than SNHUT in pediatric vasovagal syncope with previous syncopal episodes.
The expansion and remaining suitable areas of global oil palm plantations
- Qiang Zhao, Le Yu, Xiyu Li, Yidi Xu, Zhenrong Du, Kasturi Kanniah, Chengxiu Li, Wenhua Cai, Hui Lin, Dailiang Peng, Yongguang Zhang, Peng Gong
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- Journal:
- Global Sustainability / Volume 7 / 2024
- Published online by Cambridge University Press:
- 19 February 2024, e9
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Non-technical summary
Oil palm has been criticized for being an environmentally unfriendly oil crop. In recent decades, oil palm plantations have extended into conservation landscapes, causing severe environmental damage and harming biodiversity. Nevertheless, oil palm remains a highly productive oil crop from which most of the world's vegetable oil is produced. Therefore, measuring the environmental impact of oil palm plantations and identifying suitable land to support its sustainable development is crucial.
Technical summaryTo meet the rising global palm oil demand sustainably, we tracked annual land cover changes in oil palm plantation and mapped areas worldwide suitable for sustainable oil palm cultivation. From 1982 to 2019, 3.6 Mha of forests were converted to oil palm plantations. Despite a recent decline in overall conversion, the shift from forest to oil palm plantations has become increasingly more common over the last decade, rising from 14.1 to 34.5% between 2009 and 2019. During 1982–2019, 2.23 Mha of peatland and 0.1 Mha of protected areas were converted for oil palm plantations. The potential sustainable land amounts to 103.5–317.9 Mha (Asia: 44.6–105.1 Mha, Africa: 34.7–96.4 Mha, and Latin America: 35.2–116.5 Mha). Future oil palm expansion is anticipated to take place in countries like Brazil, Nigeria, Colombia, Indonesia, Ivory Coast, the Democratic Republic of the Congo, and Ghana, where more sustainable land is available for cultivation. Malaysia, on the other hand, is about to exceed the area of sustainable cultivation, and further expansion is not recommended. These findings can advance our understanding of the environmentally damaging impacts of oil palm and enhance the feasibility of sustainable oil palm development.
Social media summaryHow should suitable land be chosen for the establishment of oil palm plantations to support the sustainable development of the oil palm plantation industry?