Morning Overview on MSN
Your heart beats about 100,000 times every single day
Every person walking, sleeping, or sitting still right now depends on a muscle that contracts roughly 100,000 times before ...
Verywell Health on MSN
What are heart sounds and how to know if they’re normal
S1 and S2 are the normal heart sounds you hear when the heart valves close. Heart murmurs are extra sounds that can be heard during systole, diastole, or as a continuous sound. S3 and S4 are abnormal ...
The sinoatrial (SA) node is the natural pacemaker of the heart. It generates electrical impulses that cause the heart’s chambers to contract, setting the heart rate. The SA node typically generates 60 ...
The heart is the only muscle that contracts and relaxes continuously over a lifetime to pump oxygen-rich blood to the body's organs. Researchers at UT Southwestern Medical Center now have identified a ...
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