Additional Value of Systolic Wall Thickening in Myocardial Stunning Evaluated by Stress-rest Gated Perfusion SPECT

Overview

Journal J Nucl Cardiol

Specialty Cardiology & Vascular Diseases

Date 2017 Nov 10

PMID 29119373

Citations 8

Authors

Alberto Bestetti

Besart Cuko

Adriano Decarli

Alessio Galli

Federico Lombardi

Affiliations

Soon will be listed here.

Abstract

Aim And Patients: The aim of the present study is to evaluate the additional value of systolic wall thickening to myocardial perfusion in diagnosing myocardial stunning in patients with angiography proven coronary artery disease. We selected 91 ischemic patients (82 males; mean age 59.7 ± 10.3) with CAD documented by angiography. Ischemia was defined as a summed difference score ≥5. All patients underwent a 2-day gated perfusion SPECT protocol. The patients received a dose of 740 MBq of Tc-tetrofosmin after stress and at rest. Treadmill maximal exercise tests were performed on all patients.

Results: The post-stress LVEF was significantly lower than rest LVEF (48.1% ± 10.3% vs 50.3% ± 10.7%; P = .0001). The wall thickening summed difference score was 4.44 ± 4.13 (P = .0001). At a multivariate regression analysis, only WT-SDS as independent variable was significantly correlated with myocardial ischemia (SDS). We also divided patients according to SDS in those with mild (SDS < 8) and severe (SDS ≥ 8) ischemia. WT-SDS, but not ∆LVEF, was significantly different between groups.

Conclusions: WT-SDS, more than the depression in the global function (∆LVEF) of the left ventricle, correlates with the degree of ischemia and better identifies, when present, the stunning phenomenon.

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