Cardiac Medicine Certification (CMC) Practice Exam

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Prepare for your Cardiac Medicine Certification (CMC) Test with comprehensive quizzes, case studies, and helpful materials. Enhance your knowledge and gain confidence before the big day!

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What does ST elevation in leads V7-V9 indicate?

Anterior wall MI
Posterior wall MI
Right ventricular MI
Inferior wall MI

The correct answer is: Posterior wall MI

ST elevation in leads V7-V9 is indicative of a posterior wall myocardial infarction (MI). These leads are positioned on the posterior aspect of the chest, allowing for the visualization of electrical activity related to the posterior wall of the heart. When there is ischemia or injury to the posterior wall, it is reflected as ST elevation in these specific leads. In the context of assessing MIs, the standard precordial leads (V1-V6) primarily represent the anterior and lateral walls. However, to capture changes occurring in the posterior wall, additional leads V7, V8, and V9 are utilized. Thus, elevation in these leads points directly to pathology affecting the posterior wall, confirming the diagnosis of a posterior wall MI. This information emphasizes the importance of recognizing the significance of lead placement and the corresponding physiological territories they represent, which is essential for accurate diagnosis and management in cardiac care.