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Diagnosisbook Deficiency signs, explained in 30s. The small signals before they build up — iron, magnesium, B12, D. Save + Follow for daily checks.

Educational only, not medical advice.

10/09/2026

Full 3D video: https://youtu.be/Fh0DBK3SYdA


Two fingers on the inside of your wrist, just below the thumb. Count the beats for 30 seconds, then multiply by two. For most adults at rest, a normal heart rate is 60 to 100 beats a minute (American Heart Association); very fit people can run lower. Often above 100, or below 60 with dizziness or fainting? Talk to your doctor. Educational only, not medical advice.

10/08/2026

Full 3D video: https://youtu.be/Fh0DBK3SYdA


Your heart pumps blood to your whole body, but its thick muscle wall can't feed itself from the blood inside its chambers. The coronary arteries, the very first branches off the aorta, do that job, and they fill mostly between beats, when the heart relaxes. Chest pain or pressure with shortness of breath or a cold sweat? Call 911. Educational only, not medical advice.

10/07/2026

Full 3D video: https://youtu.be/Fh0DBK3SYdA


Magnesium (normal muscle function), potassium (normal blood pressure), omega-3 EPA & DHA (normal heart function, with 250 mg a day) and vitamin D. Educational only, not medical advice. Ask your doctor before supplementing.

10/06/2026

Full 3D video: https://youtu.be/Fh0DBK3SYdA


The SA node fires 60–100 times a minute at rest. The signal pauses at the AV node, then squeezes the ventricles from the bottom up. About 100,000 times a day, in 3D.

10/06/2026

Full 3D video: https://youtu.be/Fh0DBK3SYdA


Where is your heart really? Not on the far left. It sits almost in the center of your chest, behind the breastbone, tilted slightly left. 3D heart anatomy in 35 seconds.

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