Vascular dysfunction measured by fingertip thermal monitoring is associated with the extent of myocardial perfusion defect

Naser Ahmadi, Nudrat Usman, John Shim, Vivek Nuguri, Panukorn Vasinrapee, Fereshteh Hajsadeghi, Zhiying Wang, Gary P. Foster, Khurram Nasir, Harvey Hecht, Morteza Naghavi, Matthew Budoff

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

Background: Previous studies have shown that vascular dysfunction measured by digital thermal monitoring (DTM) during an arm-cuff reactive hyperemia procedure correlates with the severity of coronary artery disease measured by coronary artery calcium in asymptomatic patients. Current study investigates the correlation between DTM and abnormal myocardial perfusion imaging (MPI). Methods: About 116 consecutive patients with chest discomfort, age 57 ± 10 years, underwent MPI, DTM and Framingham Risk Score (FRS) assessment. Fingertip temperature rebound (TR), DTM index of vascular reactivity, was assessed after a 2-minute arm-cuff reactive hyperemia test. The extent of myocardial perfusion defect was measured by summed stress score (SSS). Results: TR decreased from SSS < 4 (1.61 ± 0.15) to 4 ≤ SSS ≤ 8 (0.5 ± 0.22) to 9 ≤ SSS ≤ 13 (0.26 ± 0.15) to SSS > 13 (-0.37 ± 0.19) (P = .0001). After adjusting for cardiac risk factors, the odds ratio of the lowest versus two upper tertiles of TR was 3.93 for SSS ≥ 4 and 9.65 for SSS ≥ 8 compared to SSS < 4. TR correlated well with SSS (r = -0.88, P = .0001). Addition of TR to FRS increased the area under the ROC curve to predict abnormal MPI, SSS ≥ 4, from 0.65 to 0.84 (P < .05). Conclusion: Vascular dysfunction measured by DTM is associated with the extent of myocardial perfusion defect independent of age, gender, and cardiac risk factors.

Original languageEnglish (US)
Pages (from-to)431-439
Number of pages9
JournalJournal of Nuclear Cardiology
Volume16
Issue number3
DOIs
StatePublished - 2009

Keywords

  • Digital thermal monitoring
  • Myocardial perfusion defect
  • Myocardial perfusion imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Cardiology and Cardiovascular Medicine

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