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Evaluation of the Severity of Intermittent Claudication Based on the Ankle Brachial Pressure Index Recovery Time after 1 Minute’s Treadmill Walking
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JPY
Abstract
Objective:Recently, it was established that ankle brachial pressure index(ABI) values recorded after 1 minute’s treadmill walking(TW)(hereafter referred to as Ex1minABI values)exhibit similar diagnostic accuracy for detecting peripheral arterial disease(PAD)to ABI values recorded after 5 minutes’ TW(Ex5minABI). In addition, measuring the Ex1minABI instead of the Ex5minABI is useful for diagnosing PAD in patients that find exercise difficult. However, the relationships between the ABI recovery time after 1 minute’s TW and walking impairment questionnaire(WIQ)‒derived parameters remain unclear. Material and Methods:Thirty‒one patients who had been diagnosed with PAD based on the detection of significant stenosis on computed tomographic angiography and predefined Ex5minABI criteria were subjected to 1 minute’s TW, 5 minutes’ TW, and the WIQ. Results:The subjects’ mean ABI recovery time after 1 minute’s TW was significantly shorter than that seen after 5 minutes’ TW. However, a strong correlation was detected between the ABI recovery times observed after 1 and 5 minutes’ TW. The ABI recovery times recorded after 1 and 5 minutes’ TW were both negatively correlated with the WIQ score. Conclusion:The severity of intermittent claudication can be assessed by measuring the ABI recovery time after 1 minute’s TW.
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