Dobutamine Stress Tissue Doppler for Evaluation of Myocardial Ischemia,
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- Category: Vol. 84, March 2016
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Dobutamine Stress Tissue Doppler for Evaluation of Myocardial Ischemia, TAMER S.M. ABD ELMAWLA, USAMA M. MOMTAZ, AYMAN N. MOHARRAM, RANIA M. EL-HOSEINY and ASHRAF W. ANDRAOS
Abstract
Objective: The rule of dobutamine stress-tissue Doppler in detection of myocardial ischemia.
Material and Methods: 35 patients with known or sus-pected CAD were divided into: Ischemic group (15pts) with coronary stenosis ³50%, normal echocardiography and control (20 patients) with normal coronary angiography and echocar-diography. Dobutamine stress-Tissue Doppler was applied to basal and mid myocardial segments with measuring S, E' and A' velocities at rest and peak stress.
Results: At rest: No statistical difference in S between ischemic group and control (7.9±1.4 vs 9±2cm/sec, respec-tively, P: NS). E' was statistically lower in ischemic group than control (8.7±2.1 vs 11.8±3.2cm/sec, respectively, p<0.05).
With Stress: The increase in S and E' were statistically lower in ischemic segments than control (S: 15.4±2.4 vs 23.5±4.4 cm/sec and E': 15.2±3.7 vs 23.3±4.9cm/sec, respec-tively, p<0.05).
No difference between both groups regarding A' velocities at rest or peak stress.
Cut-off values for ischemia: DS £115% and DE' £104% (D the increase from rest to peak stress) with sensitivity 83%, 79% and specificity 84%, 79% respectively.
Conclusion: TDI provided objective quantitative infor-mation about myocardial ischemia.