AUTHOR=Trihan Jean-Eudes , Mahé Guillaume , Croquette Magali , Coutant Vicky , Thollot Cécile , Guillaumat Jérôme , Lanéelle Damien 

TITLE=Accuracy of Acceleration Time of Distal Arteries to Diagnose Severe Peripheral Arterial Disease

JOURNAL=Frontiers in Cardiovascular Medicine

VOLUME=Volume 8 - 2021

YEAR=2022

URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2021.744354

DOI=10.3389/fcvm.2021.744354

ISSN=2297-055X

ABSTRACT=Context: Ankle-brachial (ABI) and toe-brachial index (TBI) are the recommended tests for the diagnosis of lower extremity peripheral artery disease (PAD) and the assessment of its severity, whereas Doppler ultrasound (DUS) is usually used to localize vascular lesions. However, the performance of DUS as an alternative to TBI and ABI measurement is unknown. 
Objective: The goals were i) to evaluate the correlation between DUS parameters of distal arteries of the lower extremities with TBI in patients with PAD; ii) to evaluate the correlation between DUS parameters of distal arteries with ABI; iii) to assess the diagnosis accuracy of maximal acceleration time of pedal arteries to detect toe pressure ≤ 30 mmHg. 
Methods: An observational retrospective study was conducted during a 1-year period on patients with diagnosis of PAD on DUS. Demographic data, ABI, TBI and DUS parameters of the dorsal pedis and lateral plantar arteries (DPA and LPA) were recorded. 
Results: Seventy-seven patients with 88 limbs were included, aged 69 [IQR: 11 years] with 28.6% of diabetic patients. Highest acceleration time of either DPA nor LPA (ATmax) was the most correlated to TBI on both univariate (r=-0.78, p<0.0001) and multivariate analysis (p<0.0001). DUS parameters had weaker correlation with ABI. ATmax > 215ms showed high diagnosis accuracy to a toe pressure of 30 mmHg or less (sensitivity of 86% [0.57 – 0.98] and negative predictive value of 97% [0.89 – 1.00]).
Conclusion: ATmax demonstrates a high correlation with TBI in patients with PAD, as well as high diagnostic accuracy for detection of critical limb ischemia. Based on these results, ATmax can represent the next step in evaluating PAD severity with DUS, in patients with advanced lower extremity peripheral artery disease.