Medically reviewed by Jeffrey S. Lander, MD Key Takeaways S1 and S2 are the normal heart sounds you hear when the heart ...

Whether due to stress or an intense cardio workout, most of us have felt our heart racing from time to time. A rise in your heart rate can be perfectly normal given outside circumstances. However, ...

A child's normal heart rate varies by age and size, with babies typically having higher rates than older children. It’s important for parents to know how to check their child's pulse to recognize when ...

“Lub-dub…lub-dub…lub-dub…” That’s the sound a healthy heart makes as its valves close after each pump. Your doctor wants to ...