The area of slow conduction in scar-related VT is usually located in which tissue?

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Study for the EPU Electrophysiology Exam with comprehensive questions and explanations. Enhance your knowledge with flashcards and a variety of question formats to ensure you are prepared to excel!

Multiple Choice

The area of slow conduction in scar-related VT is usually located in which tissue?

Explanation:
In scar-related VT the slow conduction area is the peri-infarct border zone around the scar, where surviving myocytes are interspersed with fibrotic tissue. This heterogeneous mix creates slow, anisotropic conduction and often fractionated electrograms, forming channels that can sustain a reentrant circuit around the scar. The dense scar core itself is largely non-conductive, remote viable myocardium conducts normally, and while epicardial fat can influence conduction, it is not the typical substrate for the slow conduction driving scar-related VT.

In scar-related VT the slow conduction area is the peri-infarct border zone around the scar, where surviving myocytes are interspersed with fibrotic tissue. This heterogeneous mix creates slow, anisotropic conduction and often fractionated electrograms, forming channels that can sustain a reentrant circuit around the scar. The dense scar core itself is largely non-conductive, remote viable myocardium conducts normally, and while epicardial fat can influence conduction, it is not the typical substrate for the slow conduction driving scar-related VT.

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