Certified Cardiographic Technician (CCT) Practice Exam 2025 - Free CCT Practice Questions and Study Guide

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In which leads can a posterior myocardial infarction be evident?

V1-2

A posterior myocardial infarction can be identified primarily through specific electrocardiographic (ECG) changes that manifest in the anterior leads. The leads that are most indicative of a posterior infarction are V1 and V2. When a posterior wall myocardial infarction occurs, it often shows ST-segment depression in these leads while there may simultaneously be ST-segment elevation in the corresponding posterior leads (not often visualized in a standard ECG). This manifests as reciprocal changes in the anterior leads.

Recognizing these patterns is crucial for effective diagnosis and management of myocardial infarction, especially since posterior myocardial infarction can be easily overlooked if one is only analyzing the more typical leads.

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I and II

II, III, AVR

V1-6

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