Visual Guide to Supraventricular Arrhythmias and Sinus Rhythm ECG Patterns 📊 Featured Patterns: •Sinus Rhythm (SR): The physiological benchmark, characterized by atrial depolarization originating from the sinoatrial node with appropriate rate and conduction. •Atrial Fibrillation (AF): Chaotic, high-frequency reentry resulting in fibrillatory waves and an irregularly irregular ventricular response. •Atrial Flutter (AFL): Macro-reentrant tachycardia, most commonly cavotricuspid isthmus-dependent,

Sinus Rhythm & Core Variations · Normal Sinus Rhythm (NSR): The physiological standard. Regular rhythm (60-100 bpm), with a normal P wave preceding each narrow QRS complex. · Sinus Tachycardia: >100 bpm. A normal physiological response to demand (e.g., exercise) or a sign of pathology (e.g., fever, anemia). · Sinus Bradycardia:

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

🫀 Normal Sinus Rhythm vs. Arrhythmia 🫀 Know the difference. Save a life. 💡 ✅ Normal Sinus Rhythm (NSR) • Heart rate: 60–100 bpm • Origin: SA node • Regular PQRST waves • Steady rhythm = Efficient circulation ⚠️ Arrhythmia • Irregular heartbeat (too fast, too slow, or erratic) • Can originate from atria, AV node, or ventricles • Examples: Atrial fibrillation, ventricular tachycardia, bradycardia • May cause dizziness, palpitations, syncope, or even cardiac arrest 💬 Swipe to see ECG examples (