20 December 2025
0:18
YouTubeCARDIOLOGY🫀
20 December 2025
🫀 ECG Waves क्या दिखाती हैं? ECG दिल की electrical activity को represent करता है। ⸻ P Wave • 👉 Atrial depolarization • Atria contract करते हैं • Small, rounded, positive • Normal duration: 0.12 sec ⸻ PR Interval • 👉 SA node से AV node तक ...
21 hours ago
Cardiac Depolarization
🫀CARDIAC CYCLE | CARDIOVASCULAR PHYSIOLOGY | HEART BEATING ANIMATION | #shorts #medicine #cardiology
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🫀CARDIAC CYCLE | CARDIOVASCULAR PHYSIOLOGY | HEART BEATING ANIMATION | #shorts #medicine #cardiology
YouTubeMedical Animations |
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Inside the Human Heart: Aortic Valve Opening & Closing in Real-Time 🫀
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Inside the Human Heart: Aortic Valve Opening & Closing in Real-Time 🫀
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Top videos
⚡️ Nodal vs Non-Nodal Action Potentials ⚡️ Nodal cells (SA node, AV node): • “Slow-response” action potentials • Calcium-driven Phase 0 → slower upstroke • No true resting membrane potential • Spontaneous depolarization = automaticity Non-nodal cells (atria, ventricles, Purkinje): • “Fast-response” action potentials • Sodium-driven Phase 0 → rapid upstroke • True resting membrane potential • Fire when stimulated 📌 Take-home: Nodal = slow, Ca²⁺-dependent, automatic. Non-nodal = fast, Na⁺-depende
0:36
⚡️ Nodal vs Non-Nodal Action Potentials ⚡️ Nodal cells (SA node, AV node): • “Slow-response” action potentials • Calcium-driven Phase 0 → slower upstroke • No true resting membrane potential • Spontaneous depolarization = automaticity Non-nodal cells (atria, ventricles, Purkinje): • “Fast-response” action potentials • Sodium-driven Phase 0 → rapid upstroke • True resting membrane potential • Fire when stimulated 📌 Take-home: Nodal = slow, Ca²⁺-dependent, automatic. Non-nodal = fast, Na⁺-depende
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pharmacology 101: Lidocaine MECHANISM: Voltage-gated sodium channel blocker → No depolarization → No pain signal. Understand the pharmacology behind the numbness.
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Cardiac Repolarization
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