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- W2092254402 abstract "A noninvasive method to assess left internal mammary artery (LIMA) patency and function would be useful because this vessel is frequently used for revascularization of the left anterior descending coronary artery. The purpose of this study was to assess the feasibility of measuring changes in LIMA velocities by transcutaneous Doppler during dipyridamole-induced vasodilation. Twenty-five patients with a LIMA graft anastomosed to the left anterior descending coronary artery were studied at least 1 month after surgery by the use of a 5 MHz transducer placed in the left supraclavicular fossa. Doppler velocity parameters were measured at baseline and after intravenous administration of dipyridamole. Dipyridamole increased mean velocity by 127% ± 54% (p < 0.001), systolodiastolic velocity time integral by 89% ± 31% (p < 0.001), and diastolic-to-systolic peak velocity ratio from 0.7 ± 0.3 to 1.2 ± 0.4 (p < 0.001). The dipyridamole-to-baseline mean velocity ratio was 2.3 ± 0.5. We conclude that it is possible to measure dipyridamole-induced changes in LIMA flow velocities and thus obtain an index of LIMA blood velocity reserve by transcutaneous Doppler echocardiography. (J Am Soc Echocardiogr 1998;11:403-8.)" @default.
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- W2092254402 date "1998-05-01" @default.
- W2092254402 modified "2023-09-27" @default.
- W2092254402 title "Noninvasive Functional Assessment of Left Internal Mammary Artery Grafts by Transcutaneous Doppler Echocardiography" @default.
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- W2092254402 doi "https://doi.org/10.1016/s0894-7317(98)70018-5" @default.
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