1. Additional Debulking Efficacy of Low-Speed Rotational Atherectomy After High-Speed Rotational Atherectomy for Calcified Coronary Lesion

    Additional Debulking Efficacy of Low-Speed Rotational Atherectomy After High-Speed Rotational Atherectomy for Calcified Coronary Lesion

    We aimed to evaluate the additional debulking efficacy of low-speed rotational atherectomy (RA) after high-speed RA by using intravascular imaging. A total of 22 severe calcified coronary lesions in 19 patients (age, 74 ± 10 years; 74% male) were retrospectively analyzed. All of these lesions underwent RA under optical coherence tomography (OCT) or optical frequency domain imaging (OFDI) guidance. At first, we performed high-speed RA with 220,000 rpm until the reduction of rotational speed disappeared; then, low-speed RA with 120,000 rpm using the same burr size was performed. OCT or OFDI was performed after both high-speed and low-speed RAs ...

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