Differentiating Sinus Tachycardia vs. Atrial Tachycardia: A Quick Guide ⚡️❤️ 🔹 Sinus Tachycardia · Normal P waves (upright in I, II, aVF) · Gradual onset/offset · Rate usually 100–180 bpm · Always 1:1 AV conduction · 🧠 Physiologic response → Treat the underlying cause 🔹 Atrial Tachycardia · Abnormal P-wave morphology (± inverted/notched) · Abrupt onset/offset (may warm-up/cool-down) · Rate typically 130–250 bpm · ❗AV block possible (key clue!) · ⚡ Intrinsic arrhythmia → Treat the rhythm (vaga

Differentiating Sinus Tachycardia vs. Atrial Tachycardia: A Quick Guide ⚡️❤️ 🔹 Sinus Tachycardia · Normal P waves (upright in I, II, aVF) · Gradual onset/offset · Rate usually 100–180 bpm · Always 1:1 AV conduction · 🧠 Physiologic response → Treat the underlying cause 🔹 Atrial Tachycardia · Abnormal P-wave morphology (± inverted/notched) · Abrupt onset/offset (may warm-up/cool-down) · Rate typically 130–250 bpm · ❗AV block possible (key clue!) · ⚡ Intrinsic arrhythmia → Treat the rhythm (vaga

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