心室再同步化治疗左室电极位置选择

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1、30-40% of the patients do not respond to CRT with improved clinical symptoms and cardiac function.The location of the LV lead is one of the most important causes of CRT non-response.The optimal LV lead position should pace the site of latest activation and avoid scar. Lack of the information about m

2、yocardial scarLack of the information about late contractionDifficulty to correspond venous anatomy with myocardial regions Cardiac ECT to assess myocardial scarCardiac ECT to assess site of latest activation3D fusion of ECT myocardial image and venous anatomy on fluoroscopy venogram Cardiac ECT ima

3、ging is available in nuclear medicine departments in all class IIIA hospitals in China.With radioactive tracers, the left-ventricular myocardium can be imaged using ECT.Tian et al. J Nucl Med 2012;53:894-901Tian et al. J Nucl Med 2012;53:894-901AHA17-SegmentModel1281281281281 2 3 4 5 6 7 8 1 2 3 4 5

4、Gate:Chen et al, J Nucl Cardiol 2005;12:687-95Cardiac ECT can assess myocardial scar on the left ventricle. Scar regions have significantly lower tracer uptake than normal regions.Cardiac ECT can assess LV function. Specifically, with the phase analysis technique, cardiac ECT can assess LV dyssynchr