An Osmosis Video: Heart Attack Explained

According to the world health organization, cardiovascular disease is the leading cause of death worldwide, as well as in the US. Of those, a large proportion are caused by heart attacks, also known as acute myocardial infarctions, or just myocardial infarctions, sometimes just called MI. The word infarction means that some area of tissue has…

Normal heart sounds

If you put a stethoscope over the chest, you’ll usually hear something that sounds like lub dub, lub dub, lub dub, which repeats over and over again, with each cardiac cycle, or heartbeat. Now, the question is, where does this sound come from? Normally, blood is constantly moving through the four chambers of the heart-…