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Sep 5, 2025 54 min

STEMI ischemic and reciprocal change patterns

from Emergency Medicine Mnemonics Hosted by Aaron Tjomsland

In a cardiac emergency, pattern recognition saves lives. The ability to rapidly identify ST-elevation myocardial infarctions (STEMIs) — and recognize their reciprocal changes — is one of the most high-yield clinical skills you can master. But memorizing lead groupings, artery territories, and reciprocal zones can feel abstract… until now. This podcast brings EKGs to life inside a colorful, stadium-themed world where each ECG lead is a character in the crowd — making it dramatically easier to remember the key patterns of ischemia and their reciprocals. Whether you’re a student, clinician, or educator, this episode transforms clinical EKG interpretation into vivid, unforgettable storytelling. 🧠 Characters You’ll Meet: • Inferior Peasants (II, III, aVF) — Dirty, disheveled townsfolk crowd-surfing with broken RC cars (Right Coronary Artery), holding crossed-out nitro packs to remind us: No nitro in RCA infarcts! • Royal Ladder Holders (I, aVL, V5, V6) — Crowned kings and queens dropping through trapdoors as reciprocal ST depression hits the lateral leads, each holding golden ladders labeled Left Circumflex. • Cavemen with Septal Bones (V1–V2) — Giant-nosed, primitive figures gripping a huge bone marked SEPTAL, standing just in front of… • Shirtless Musclemen (V3–V4) — Tattooed with the word Anterior, these strongmen are chained to a floating AC unit labeled Left Ventricle — representing the LAD (Widowmaker). • Posterior Posts (V7–V9) — Hydraulic pylons rising behind the wall, symbolizing posterior MI that’s often missed without reciprocal signs. 🎯 Quick Reference Patterns Covered in the Episode: ⸻ ✅ Inferior MI (II, III, aVF) • ST elevation: Inferior leads • Reciprocal depression: I, aVL (high lateral) → “When the peasants rise, the royals fall.” ✅ High Lateral MI (I, aVL) • ST elevation: High lateral leads • Reciprocal depression: III, aVF → Works both ways: “The balcony royals rise, the peasants fall.” ✅ Posterior MI (V7–V9) • ST elevation: Posterior wall (not on standard 12-lead!) • Reciprocal depression: V1–V3 → “When posterior posts rise, septal cavemen drop.” ✅ Anterior MI (V2–V4) • ST elevation: Anterior leads • Possible reciprocal depression: II, III, aVF → Sometimes: “When the chest heroes rise, peasants tremble.” ✅ Low Lateral MI (V5–V6) • ST elevation: Low lateral leads • Reciprocal depression: V1–V2 (septal) → “Kings and queens rise, cavemen fall.” ⸻ 🔥 Bonus Insights: • Why reciprocal changes matter: They can confirm a true STEMI, suggest a larger infarct area, and sometimes reveal hidden infarctions (like posterior MIs). • LBBB & Reciprocal Thinking: LBBB distorts ST segments, but understanding the mirror logic behind “William” (LBBB) and “Marrow” (RBBB) helps clarify expected patterns. ST depression in V1–V2? May just be part of LBBB — unless it’s concordant… 📌 Use this episode as your visual and verbal anchor. Once you’ve seen the peasants, the royalty, the cavemen, and the Left Vent AC unit, you’ll never look at a 12-lead the same way again.

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This episode is 54 minutes long.

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This episode was published on September 5, 2025.

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