Why Even Fit People Are At Risk of a Heart Attack

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Think heart attacks only happen to people who are unhealthy or don't exercise? Think again. In this video, Jonathan from the Institute of Human Anatomy, breaks down the incredible story of his athlete brother who suffered a heart attack during a half-marathon, and what the angiogram revealed about his heart.

We use real human anatomy to expose the surprising truth about plaque buildup, atrial fibrillation (AFib), and the unique physiological adaptations that can make a heart more resilient—or more vulnerable—to a sudden myocardial infarction.

This could save your life or the life of a loved one. Watch to the end to learn the cardiovascular screening tests you need to know about, regardless of your current fitness leve
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Table of Contents 🧭
00:00 - Intro
01:06 - What is a Myocardial Infarction? (Heart Attack Anatomy)
01:32 - Coronary Arteries and Blood Flow to the Heart
02:05 - The "Widowmaker" Artery (Left Anterior Descending Artery)
02:31 - Atherosclerosis & Plaque Buildup in Coronary Artery Disease
03:30 - How Much Blockage Causes Symptoms? (The 70% Rule)
04:20 - Stable Angina (Chest Pain with Exertion) Explained
05:06 - Plaque Rupture: The Most Common Cause of a Sudden Heart Attack
05:33 - Heart Attack Symptoms (Including Subtle Signs in Women)
05:59 - How Long Until Irreversible Heart Damage Occurs?
06:35 - Treatment: Clot-Busting Drugs & Angioplasty (Placing a Stent)
07:13 - Risk Factors for Plaque: High Blood Pressure, Smoking, Cholesterol
08:12 - My Brother's Story: Heart Attack During a Spartan Race
09:11 - The Race, the Delay, and the Text: "I'm at the hospital."
12:44 - Atrial Fibrillation (AFib): Symptoms, Causes, and Dangers
14:50 - Cardioversion and Why the Paramedics Took Him
15:12 - Troponin Levels: How they Diagnose a Heart Attack
16:25 - The Diagnosis: Type 2 Myocardial Infarction Secondary to AFib
17:46 - Collateral Circulation: Why Athletes are Resilient (Anatomy Deep Dive)
19:07 - How Exercise Helps Grow New Collateral Blood Vessels
19:52 - What Caused the AFib? Dehydration, Sleep, and High Caffeine
20:48 - The Verdict: Should I Still Exercise If I Have Plaque Buildup?
21:25 - Crucial Screening Tests: CAC Score & CT Angiogram (Reducing Your Risk)
22:17 - The Importance of Lifestyle: Diet, Sleep, Stress, and Exercise
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Common Questions 🤔
What is a myocardial infarction?
How much artery blockage is dangerous?
What is the difference between Type 1 and Type 2 heart attack?
Can high-intensity exercise cause a heart attack?
What is a CAC (Coronary Artery Calcium) scan?
How does atrial fibrillation (AFib) cause a heart attack?
What are collateral vessels and how do they protect the heart?
What are the heart attack symptoms in women?
Why is troponin checked after a suspected heart attack?
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#heartattack #cardiology #anatomyeducation #atherosclerosis #healthscreening #afib
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