BA.1 在英格兰使用双对应的COVID-19疫苗和中风
Nick Andrews1, Julia Stowe1, Elizabeth Miller2
1Immunisation Division, UK Health Security Agency, London, United Kingdom.
JAMA
|June 15, 2023
概括
No abstract available in PubMed .
相关概念视频
00:42Cross-reactivity
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Overview
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01:27Regulation of Stroke Volume
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The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
3.3K