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Disopyramide improves the balance between myocardial oxygen supply and demand in patients with hypertrophic obstructive cardiomyopathy

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Summary

We evaluated the effects of disopyramide in terms of the balance between myocardial oxygen supply and demand in patients with hypertrophic obstructive cardiomyopathy (HOCM). The myocardial oxygen supply was evaluated by measuring coronary flow velocity and the myocardial oxygen demand was assessed by the pressure-volume area (PVA). The time velocity integral of coronary flow did not change significantly (20±6 to 21±8 cm), but the peak left ventricular pressure and left ventricular external work decreased significantly (206±44 to 157±37 mmHg,P<0.001; 1.09±0.33 to 0.80±0.23 J/beat,P<0.001) after disopyramide administration. From theoretical analysis using these data, we concluded that disopyramide improves the myocardial oxygen supply-demand balance in patients with HOCM.

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Authors and Affiliations

  1. The Heart Institute of Japan, Tokyo Women’s Medical College, 8-1 Kawada-cho, Shinjuku-ku, 162, Tokyo, Japan

    Kiyomi Niki, Motoaki Sugawara, Ryuta Asano, Toshiaki Oka, Yukiyoshi Kondoh, Shunsuke Tanino, Kazunori Iwade, Nobuhisa Magosaki, Hiroshi Kasanuki & Saichi Hosoda

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  1. Kiyomi Niki
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  2. Motoaki Sugawara
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  3. Ryuta Asano
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  4. Toshiaki Oka
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  5. Yukiyoshi Kondoh
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  6. Shunsuke Tanino
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  7. Kazunori Iwade
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  8. Nobuhisa Magosaki
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  9. Hiroshi Kasanuki
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  10. Saichi Hosoda
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Niki, K., Sugawara, M., Asano, R. et al. Disopyramide improves the balance between myocardial oxygen supply and demand in patients with hypertrophic obstructive cardiomyopathy. Heart Vessels 12, 111–118 (1997). https://doi.org/10.1007/BF02767128

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  • DOI: https://doi.org/10.1007/BF02767128

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