Risk stratification in ACS — Flashcards

Flashcard 1: What leads (1) show ST elevations or Q waves in a Left Main (LCA) myocardial infarction? _____

Answer: aVR

Flashcard 2: What leads show ST elevations or Q waves in a posterior myocardial infarction? _____

Answer: V7 - V9

Flashcard 3: Cardiovascular Nitrates are useful in treatment of acute _____ syndromes

Answer: coronary

Flashcard 4: Myocardial infarction most commonly involves the _____ artery (45%)

Answer: left anterior descending (LAD)

Flashcard 5: Troponin I levels return to normal _____ after an MI

Answer: 7-10 days

Flashcard 6: What leads (2) show ST elevations or Q waves in an anteroapical myocardial infarction? _____

Answer: V3 - V4

Flashcard 7: What EKG findings are associated with stable angina? _____

Answer: ST-segment depression (subendocardial ischemia)

Flashcard 8: What leads (2) show ST elevations or Q waves in a lateral myocardial infarction? _____

Answer: I, aVL

Flashcard 9: What leads show ST elevations or Q waves in an **anterolateral** myocardial infarction? _____

Answer: V4–V6, I, aVL

Extra: 1. **Left anterior descending artery (LAD):** infarction of the anterior wall and anterior septum of the LV (Leads V1–V4) 2. **Left circumflex artery (LCX):** infarction of the lateral wall of the LV (Leads I, aVL, V5–V6) 3. **Right coronary artery (RCA):** infarction of the posterior wall, posterior septum, and papillary muscles of the LV (Leads II, III, aVF) Note: Papillary muscle rupture (typically from RCA/PDA occlusion) may cause acute mitral regurgitation.

Flashcard 10: The second most common artery involved in a myocardial infarction is the _____

Answer: right coronary artery

Extra:  1. Left anterior descending artery (45%): infarction of the anterior wall and anterior septum of the LV 2. Right coronary artery: infarction of the posterior wall, posterior septum, and papillary muscles** of the LV 3. Left circumflex artery: infarction of the lateral wall of the LV **papillary muscle rupture may often cause mitral regurgitation Watch associated Bootcamp video [https://app.bootcamp.com/med-school/cardiology/videos/myocardial-infarction?index=4] https://onlinemeded.org/spa/cardiac?ref=anki