低身体质量指数的悖论
Masamichi Yano1, Yasuyuki Egami1, Noriyuki Kobayashi1
1Division of Cardiology, Osaka Rosai Hospital.
International heart journal
|February 1, 2026
概括
患有心房动 (AF) 和低体重指数 (BMI) 的患者面临心力衰竭住院和死亡的更高风险,尽管在切除术后心律失常的复发率较低. 对于低BMI患者的干预措施,需要进一步研究.
科学领域:
- 心脏病学 心脏病学
- 内部医学 内部医学
- 公共卫生 公共卫生
背景情况:
- 低体重指数 (BMI) 与心房 (AF) 复发,心血管事件和死亡率有关.
- 以前的研究可能没有完全控制年龄,营养状况,贫血和心脏功能等混因素.
- 在经过切除术的AF患者中,与低BMI相关的具体风险尚不清楚.
研究的目的:
- 为了研究低BMI与心房后结局的相关性.
- 评估心力衰竭住院和全因死亡的复合终点,通过BMI分层的AF患者.
- 在考虑基线因素后,澄清低BMI的AF患者的风险.
主要方法:
- 倾向性得分匹配用于平衡低BMI和正常/高BMI组之间的基线特征.
- 分析包括2396名经过初级切除术的AF患者.
- 使用卡普兰-梅尔分析和考克斯比例危险分析来评估结果.
主要成果:
- 在倾向分数匹配后,正常/高的BMI与持续性AF中较高的晚期心律失常复发有关,但不是帕洛西斯马性AF.
- 心力衰竭住院和全因死亡的发生率在低BMI组显著更高.
- 低BMI是较高综合终点风险 (HR = 2.43) 的独立预测因素.
结论:
- 尽管心律失常的复发率较低,但低BMI的AF患者具有矛盾地更高的心力衰竭住院和全因死亡风险.
- 这些发现强调了针对低BMI的AF患者进行有针对性的干预的必要性.
- 进一步的研究是有必要的,以了解和减轻这些风险.
相关概念视频
01:12Reduced Mass Coordinates: Isolated Two-body Problem
2.4K
In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...
2.4K
01:52Atomic Mass
70.2K
Atoms — and the protons, neutrons, and electrons that compose them — are extremely small. For example, a carbon atom weighs less than 2 × 10−23 g. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu). The amu was originally defined based on hydrogen, the lightest element, then later in terms of oxygen. Since 1961, it has been defined with regard to the most abundant isotope of carbon, atoms of which...
70.2K
01:54Molar Mass
86.7K
The identity of a substance is defined not only by the types of atoms or ions it contains but by the quantity of each type of atom or ion. For example, water, H2O, and hydrogen peroxide, H2O2, are alike in that their respective molecules are composed of hydrogen and oxygen atoms. However, because a hydrogen peroxide molecule contains two oxygen atoms, as opposed to the water molecule, which has only one, the two substances exhibit very different properties.
86.7K
01:25Body Temperature
4.4K
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
4.4K
01:07Body Temperature
1.5K
Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C...
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C...
1.5K
01:16Centroid of a Body
1.8K
The centroid is an important concept in engineering, physics, and mechanics. It is the geometric center of a body. It always lies within the body except in cases with holes or cavities. When the material that a body is composed of is uniform or homogeneous, the centroid coincides with its center of mass or the center of gravity.
For a homogeneous body with constant density, the centroid can usually be found using equations representing a balance of the moments of the body's volume. If the...
For a homogeneous body with constant density, the centroid can usually be found using equations representing a balance of the moments of the body's volume. If the...
1.8K