Your life depends on the regular beat of your heart. Dr Karl explains how this mighty four-stage pump works. The heart is the organ of love — but it's also a mighty pump. In an average 75-year ...

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

New research suggests that regular aerobic exercise doesn’t just benefit the heart muscle, but subtly rewires the nerves that control how the heart works. Regular physical activity does more than ...

Dr. Paul Friedman answers the question: 'Heart Block versus Artery Blockage?' — -- Question: I have been diagnosed with heart block. How does this differ from blockage in one of my arteries?

Have you ever paused to wonder how many times your heart has beaten since birth? This incredible organ works tirelessly, never resting, yet most of us rarely consider its relentless rhythm, ...