@Dr. Bahaa Dmour One Beat, Two Circuits 🫀 ────────── 💓 Your heart beats about 100,000 times a day—and most people never realize that the heart muscle itself gets its blood supply mainly during relaxation (diastole), not during the squeeze. 🫀 Quick facts you’ll remember: • Atria and ventricles are electrically insulated—normally, only the AV node connects them. ⚡️ • Heart cells are loaded with mitochondria because the heart depends on oxygen 24/7. 🔋 • Valves have minimal direct blood supply,
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@Dr. Bahaa Dmour One Beat, Two Circuits 🫀 ────────── 💓 Your heart beats about 100,000 times a day—and most people never realize that the heart muscle itself gets its blood supply mainly during relaxation (diastole), not during the squeeze. 🫀 Quick facts you’ll remember: • Atria and ventricles are electrically insulated—normally, only the AV node connects them. ⚡️ • Heart cells are loaded with mitochondria because the heart depends on oxygen 24/7. 🔋 • Valves have minimal direct blood supply,
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