FRANCE — Did you know that, long before anyone else, Leonardo da Vinci called into question Galen's description of how the heart works? This is just one of the many interesting tidbits featured in ...

Arteries are blood vessels. Most carry oxygen-rich blood from the heart to various organs and tissues. Arteries are a part of the circulatory system, along with the heart and other blood vessels. The ...

For centuries, scientists believed the human body had two major circulation systems. One was the cardiovascular system that moves blood through arteries and veins. The other was the lymphatic system ...

Senior male patient with ECG sensor on his chest in clinic. Elderly male with face mask getting his cardiac stress test in cardiology clinic. COVID-19 induces a range of negative cardiac effects, such ...

Second-degree heart block is a potentially serious but treatable condition affecting the heart’s electrical system. Treatment may require a pacemaker to stabilize the heart’s rhythm. Electrical ...