Relating to or affecting the endocardium, the smooth inner lining of the heart that covers all chambers and heart valves.
From Greek 'endo-' (within) + 'kardia' (heart) + '-ac' (relating to). This medical adjective describes conditions or characteristics of the heart's innermost tissue layer.
Endocardiac infections like endocarditis are super serious because bacteria on that inner lining can cause blood clots and damage valve function—your heart literally can't beat properly.
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