TQ-ST segment mapping: critical review and analysis of current concepts.

摘要: Controversy and confusion surround many aspects of TQ-ST segment mapping today. Technical standards pertaining to the recording measurement deflection have not been uniformly established nor has correlative value as an indicator myocardial injury clearly ascertained. The is believed originate primarily although exclusively a result extracellular potassium accumulation in ischemic region subsequent establishment transmembrane potential gradient during diastole systole at boundary. Nonspatial factors (including electrolytes, antiarrhythmic agents, heart rate) influence by altering this gradient. Spatial area shape, electrode location) alter relative position boundary site such can be analyzed with solid angle theorem. Further study complex behavior deflection, particularly presence pharmacologic intervention, necessary before techniques used reliably clinical studies designed quantitate modify damage.