A medical condition involving weakness or loss of strength in cardiac function or the heart muscle.
From Greek 'kardia' meaning 'heart' combined with 'astheneia' from 'asthenes' meaning 'weak.' This 19th-century medical term was used to describe various forms of cardiac weakness before modern cardiology developed precise diagnostic tools.
Cardiasthenia was a catch-all diagnosis in the 1800s—doctors used it when the heart seemed weak but they couldn't identify the exact problem. As an example of outdated medicine, it's actually fascinating because it shows how science progresses by getting more specific.
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