Relating to both the heart and the kidneys, or describing a condition affecting both organs.
From Greek 'kardia' (heart) + 'nephros' (kidney). This compound medical adjective emerged to describe diseases like heart-kidney syndrome where dysfunction in one organ affects the other.
Your heart and kidneys are deeply connected—if your heart fails, your kidneys can't filter blood properly, and vice versa, which is why cardiorenal disease is so serious.
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