Fourier transformation of arterial Doppler waveforms of the lower extremity

Lee, Hong Gi; Yum, Myung‐Kul

doi:10.1002/jcu.20040

Cited by 2 publications

(1 citation statement)

References 34 publications

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“…Instead, there are either monophasic or variant triphasic flow patterns. The upstroke of the first wave became steep, which is drastically different compared with the control group [p < 0.05] (16). The result may be relevant to the variety of conditions of the area proximal to an occlusion (17).…”

Section: Wang Et Almentioning

confidence: 95%

Evaluation of Haemodynamic Changes of Proximal Arterial Occlusion in the Lower Extremities by Spectrum Doppler Ultrasonography

Wang¹,

Shi²,

Zhou³

et al. 2015

WIMJ Open

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There were 39 diseased lower limbs. The occlusion sections were located in the superficial femoral artery and/or popliteal artery, and there was no significant stenosis proximal to the point of occlusion. In the 34 patients, there were 28 males and six females, age range 44-78 years old. They were all diagnosed with lower limb occlusive artery disease by computed tomography angiography (CTA). The control group consisted of 10 males and nine females who did not smoke, did not have lower limb arteriosclerosis, vascular malformation, stenosis, or arterial expansion. Blood pressure, blood glucose and lipid levels were in the normal range. This study was conducted in accordance with the Declaration of Helsinki and was

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Section: Wang Et Almentioning

confidence: 95%

Evaluation of Haemodynamic Changes of Proximal Arterial Occlusion in the Lower Extremities by Spectrum Doppler Ultrasonography

Wang¹,

Shi²,

Zhou³

et al. 2015

WIMJ Open

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Fourier Analysis of Peripheral Blood Pressure and Flow in Intraoperative Assessment of Infrainguinal Arterial Reconstructions

Cheshmedzhiev¹,

Mircheva²,

Jordanov³

et al. 2014

Folia Medica

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AIM:To assess infrainguinal arterial reconstructions by intraoperative fl owmetry under the distal anastomosis using a fast Fourier transformation; calculate and compare the amplitude ratios of peripheral arterial blood pressure and volume fl ow before and after drug-induced vasodilation of occluded bypass grafts and bypass grafts that have been patent at least for 1 year. To fi nd what magnitude of the change of these ratios indicate a long-term patency of the bypass grafting. PATIENTS AND METHODS: We compared the results of the intraoperative fl owmetry tests of 97 patients with infrainguinal arterial reconstructions. The patients were divided into two groups based on the graft status: the grafts in 49 patients were patent for at least a year, and 48 patients had failed bypass. We used a fast Fourier transform (FFT) of the pressure and blood fl ow waves and compared the ratios of their amplitudes before and after administration of a vasodilator drug into the graft. Comparing the ratios obtained before and those after administration of the drug we quantifi ed their change in each group and analysed them. RESULTS: After a drug-induced vasodilation, the blood pressure and fl ow amplitude ratios for the group with compromised reconstructions were less than 1.9 times smaller than those before drug infusion, while for the group with bypass grafts that had been functional for at least 12 months the ratios declined by more than 1.9 ≈ 2 times. CONCLUSION: The magnitude of the change of amplitude ratios of the peripheral pressure and volume fl ow after drug-induced vasodilation can be used to make an assessment of the bypass graft and the distal arterial segment. Key words: fast Fourier transform (FFT), distal anastomosis, mean volume fl ow (MVF), mean arterial pressure (MAP), peripheral vascular resistance (PVR)Folia Medica 2014; 56(2): 102-108 Copyright © 2014 Medical University, Plovdiv РЕЗЮМЕ ЦЕЛЬ: Работа ставит себе целью изучить применение быстрой трансформации Фурье в целях оценки инфраингвинальных артериальных реконструкций посредством интраоперативной флоуметрии под дистальным анастомозом, сравнивая результаты отношений амплитуд периферического артериального давления и объема кровотока до и после медикаментозной вазодилатации компрометированных и функционировавших не менее года байпасов, а также определить при каком изменении этих отношений можно предполагать их более продолжительную проходимость. ПАЦИЕНТЫ И МЕТОДЫ: Авторы сравнили данные интраоперативных флоуметрий 97 пациентов с инфраингвинальными артериальными реконструкциями. Пациенты разделены на две группы: первая группа -49 пациентов с функционировавшими не менее года байпасами; вторая группа -48 пациентов с компрометированными. Применена быстрая трансформация Фурье (FFT) давления и кровотока и сравнено отношение их амплитуд до и после инфузии медикамента с вазодилатирующим эффектом посредством имплантата (graft). Сопоставляя результаты отношений до и после применения медикамента, авторы определили количественно их изменение в каждой группе в от...

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Fourier transformation of arterial Doppler waveforms of the lower extremity

Abstract: Abnormal waveforms could be characterized by the predominant amplitude of the H1, phase delay of the H1 and H2, and shortening of the relative phase of the H3. These parameters may be useful in the evaluation of Doppler waveforms in patients with peripheral arterial disease.

Cited by 2 publications

References 34 publications

Evaluation of Haemodynamic Changes of Proximal Arterial Occlusion in the Lower Extremities by Spectrum Doppler Ultrasonography

Evaluation of Haemodynamic Changes of Proximal Arterial Occlusion in the Lower Extremities by Spectrum Doppler Ultrasonography

Fourier Analysis of Peripheral Blood Pressure and Flow in Intraoperative Assessment of Infrainguinal Arterial Reconstructions

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