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Возможности перфузионно-метаболической сцинтиграфии миокарда в прогнозе результатов кардиоресинхронизирующей терапии у больных дилатационной кардиомиопатией

Возможности перфузионно-метаболической сцинтиграфии миокарда в прогнозе результатов кардиоресинхронизирующей терапии у больных дилатационной кардиомиопатией

Abstract

Aim: to evaluate myocardial perfusion and metabolism of the left ventricle (LV) in patients with dilated cardiomyopathy (DCMP) and to use these data for development of gamma-scintigraphic predictors of cardiac resynchronization therapy (CRT) efficacy. The study included DCMP patients (n=51) who received CRT. Before treatment, all patients underwent examination of the myocardial metabolism and perfusion by using ß-methyl-p-[123I] iodophenyl-pentadecanoic acid ( 123I-BMIPP) and 99mTc-methoxyisobutylisonitrile, respectively. The 17-segment model of the LV myocardium was used to evaluate metabolic and perfusion deficits as well as perfusion-metabolism mismatch. After 6 months of CRT, patients whose end-systolic volume (ESV) decreased by 15% and more were qualified as “responders” whereas those with ESV decrease by less than 15% were considered “nonresponders”. Groups of “responders” (n=36) and “nonresponders” (n=15) significantly differed by the sizes of perfusion defects (8.70+2.94% vs. 13.73±1.92%, p<0.00005) and metabolic defects seen in the early images (7.97+4.39% vs. 13.23±3.32%, p<0.01). These results of perfusion-metabolic SPECT correlated with post-CRT LV ESV and post-CRT LV ejection fraction. Results of myocardial perfusion-metabolism scintigraphy with 123I-BMIPP may be used as additional diagnostic criteria for selection of patients for CRT and for prediction of efficacy of this interventional method of treatment in patients with DCMP.

Цель работы: оценить состояние перфузии и метаболизма миокарда левого желудочка (ЛЖ) у больных дилатационной кардиомиопатией (ДКМП) и разработать на этой основе гамма-сцинтиграфические предикторы эффективности кардиоресинхронизирующей терапии (КРТ). С помощью однофотонной эмиссионной компьютерной томографии (ОФЭКТ) миокарда с 1231-фенил-метил-пентадекановой кислотой (ФМПДК) и 99mТc:-метоксиизобутилизонитрилом обследованы пациенты с ДКМП (n=51), направленные на КРТ. Через 6 мес. все больные были распределены на 2 группы: “респондеры” (уменьшение конечно-систолического объема КСО на 15% или более) и “нереспондеры” (снижение КСО менее чем на 15%). Полученные сцинтиграфические результаты были сопоставлены с показателями сократимости ЛЖ как в целом по выборке, так и между группами. Группы “респондеров” (n=36) и “нереспондеров” (n=15) достоверно различались по среднему размеру предсуществующих дефектов перфузии (8,70+2,94% и 13,73±1,92% соответственно; p<0,00005), а также величине зон нарушенного метаболизма (7,97±4,39% и 13,23±3,32% соответственно; p<0,01). Была выявлена корреляция указанных результатов перфузионно-метаболической ОФЭКТ со значениями КСО и фракцией выброса ЛЖ после КРТ. Полученные результаты могут быть использованы в качестве дополнительных критериев отбора пациентов на КРТ, а также в прогнозе эффективности данного вида интервенционного лечения больных ДКМП.

Keywords

ДИЛАТАЦИОННАЯ КАРДИОМИОПАТИЯ, МЕТАБОЛИЧЕСКАЯ СЦИНТИГРАФИЯ МИОКАРДА, КАРДИОРЕСИНХРОНИЗИРУЮЩАЯ ТЕРАПИЯ, ПРОГНОЗ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze