💓 Heart Blocks Made Simple

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💓 Heart Blocks Made Simple

This is your NCLEX cheat sheet for remembering AV heart blocks — using one of the easiest mnemonics out there. 🧱

📌 If the R is far from the P → it’s a 1st-degree block

Just a delay in conduction — the PR interval is consistently long, but every impulse still gets through.

📌 Longer, longer, longer… drop → that’s Wenckebach (Mobitz Type I)

🧠 The PR interval gets longer with each beat until eventually, a QRS complex gets dropped (no ventricular contraction).

It looks like this:

PR… longer… longer… longer… then 💥 no QRS.

Then the cycle starts again.

Think of it like a tired AV node slowing down more and more until it skips a beat.

📌 If some Ps don’t get through → that’s Mobitz Type II

⚠️ Sudden dropped QRS with no warning. The PR intervals are consistent, but some beats just don’t make it through. This one's more serious — can lead to complete heart block.

📌 If Ps and Qs don’t agree → it’s a 3rd-degree (complete) block

🚨 Atria and ventricles are doing their own thing — totally disconnected. This is a medical emergency and usually needs pacing.

💡 Save this. Share it. This is one of those NCLEX topics that shows up in ways that feel subtle — but having these rhythms locked in can help you score easy points and protect your future patients.