The value of transient ischemic dilation for detecting restenosis after coronary artery revascularization

Abstract

In this selected patient cohort with prior coronary revascularization, TID is an important marker of obstructive CAD and has incremental value over SPECT MPI alone.

Diagnostic radiology methods for assessing coronary artery bypass graft viability

“…Gultekin и соавт. [66] обследовали 104 пациента, у которых после недавней коронарной реваскуляризации рецидивировали симптомы ИБС: 62 пациента перенесли чрескожную ангиопластику (75 артерий) и 42 -АКШ (104 артерии). Всем им провели стресс-ОФЭКТ-ПСМ и повторную коронарную ангиографию.…”

“…Напротив, у пациентов во второй группе не было гипокинезов стенки Рисунок. Кривая ROC-анализа отношения объема ЛЖ в состоянии стресса и покоя у пациентов с предшествующей коронарной реваскуляризацией для выявления обструктивной (стеноз > 70%) ИБС [66] в указанных сегментах миокарда ЛЖ (р < 0,05, первая группа vs вторая). Результаты этого исследования показывают, что трансплантаты ВГА реагируют на повышенную потребность в кровотоке при физической нагрузке практически так же как ТПВ.…”

Transient dilation of the left ventricular cavity observed during myocardial perfusion imaging: What is its incremental diagnostic value

“…Therefore, the method used for the quantitative assessment and the definition of TID used in the study are of great importance if this criteria is applied on all patients having a MPI study. In their study, Gultekin et al 22 have found that the optimal cut-off value for detecting significant obstructive CAD for the stress-rest LV volume ratio was 1.20 with the imaging protocol used in their patient population, for both exercise stress and vasodilator SPECT MPI. This finding raises the question of the reliability of the TID ratio measurement and its definition.…”

“…Implementation of non-perfusion imaging parameters such as increased radiotracer lung uptake on post-stress images or TID also improves the diagnostic accuracy of MPI. In this regard, this issue of the Journal of Nuclear Cardiology includes an interesting study by Gultekin et al 22 on the value of TID for detecting restenosis after coronary artery revascularization using either a same-day or a 2-day 99mTc-sestamibi SPECT MPI protocol in 104 patients who had recent coronary revascularization and recurrent symptoms with a repeat coronary angiography. Both treadmill exercise and dipyridamole vasodilator stress were used.…”