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  1. Heart - Wikipedia

    Cardiac muscle tissue has autorhythmicity, the unique ability to initiate a cardiac action potential at a fixed rate—spreading the impulse rapidly from cell to cell to trigger the contraction of the entire heart.

  2. Cardiovascular Center - Boston Medical Center

    Our expert, multidisciplinary team offers a wide range of services to both treat and prevent cardiac diseases and conditions. From stents to smoking cessation, we can help you keep your heart healthy.

  3. Heart: Anatomy & Function - Cleveland Clinic

    Jan 26, 2024 · Electrical impulses make your heart beat, moving blood through these chambers. Your brain and nervous system direct your heart’s function. What is the function of the heart? Your heart’s …

  4. Heart disease - Symptoms and causes - Mayo Clinic

    Aug 13, 2024 · Coronary artery disease is a common heart condition that affects the major blood vessels that supply the heart muscle. A buildup of fats, cholesterol and other substances in and on the artery …

  5. Heart | Structure, Function, Diagram, Anatomy, & Facts ...

    Dec 6, 2025 · heart, organ that serves as a pump to circulate the blood. It may be a straight tube, as in spiders and annelid worms, or a somewhat more elaborate structure with one or more receiving …

  6. CARDIAC Definition & Meaning - Merriam-Webster

    The meaning of CARDIAC is of, relating to, situated near, or acting on the heart. How to use cardiac in a sentence.

  7. About Heart Disease | Heart Disease | CDC

    May 15, 2024 · High blood pressure, high blood cholesterol, and smoking are key risk factors. 1 out of every 5 deaths in the United States are due to heart disease. What is heart disease? The term "heart …

  8. American Heart Association | To be a relentless force for a ...

    5 days ago · More than 350,000 cardiac arrests happen outside hospitals each year - and 70% occur at home. You can help train more families to act when every second counts by giving a gift that …

  9. Cardiac | definition of cardiac by Medical dictionary

    1. pertaining to the heart. 2. pertaining to the ostium cardiacum. cardiac arrest sudden and often unexpected stoppage of effective heart action.

  10. Cardiovascular system: Function, organs, conditions, and more

    May 22, 2025 · The cardiac cycle consists of two phases: systole (contraction) and diastole (relaxation). Some conditions that can affect the heart include heart attack, stroke, heart failure, and arrhythmia.