🫀 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 (