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a somewhat heart-shaped curve, being the path of a point on a circle that rolls externally, without slipping, on another equal circle. Equation: r = a (1−cosA).
a heart-shaped curve generated by a fixed point on a circle as it rolls around another fixed circle of equal radius, a. Equation: r = a(1 – cos φ), where r is the radius vector and φ is the polar angle
A heart-shaped plane curve, the locus of a fixed point on a circle that rolls on the circumference of another circle with the same radius.


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  • Cardiokinetic

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  • Cardiokymogram

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  • Cardiokymograph

    cardiokymograph cardiokymograph car·di·o·ky·mo·graph (kär’dē-ō-kī’mə-grāf’) n. A noninvasive device, placed on the chest, capable of recording motion made by the anterior left ventricle segmental wall of the heart.

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