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.

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 …

Jan 21, 2026 · 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 …

Aug 13, 2024 · Coronary artery disease, also called CAD, is a condition that affects your heart. It is the most common heart disease in the United States. CAD happens when coronary arteries struggle to …

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 …

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

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

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.

The cardiac cycle begins with atrial systole and progresses to ventricular systole, atrial diastole, and ventricular diastole, when the cycle begins again. Correlations to the ECG are highlighted.

Aug 22, 2024 · As the heart beats, it pumps blood through a system of blood vessels called the circulatory system. The vessels are elastic tubes that carry blood to every part of the body. Blood is …