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What causes a heart attack?

submitted by kronosposeidon

1 decade 5 years 10 months ago

Short animated video with narration that describes the basic mechanism of a heart attack. So stop smoking, dammit.

2 Comments

SDGundamX

says...

Never knew about the fissures. What causes those? Is it simply a matter of heredity?

charliem says...

Doctors can listen for the formation of a clot with a stethoscope. It almost always gives the telltail "fluttering" noise just prior to a fatal blockage, this is due to how the semi-blocked artery changes the flow of blood through the passageway, and can be likened to how a plane gets lift.

As the artery begins to block, the blood flows quicker inside the artery than normal. This increased rate of flow causes the pressure to drop at the clot site, and as the surrounding tissue is at atmospheric pressure (read: now at a higher pressure than inside the artery), the artery collapses on itself, until pressure inside the artery equalises with the surrounding tissue, and it opens up again.

This rapid successive open and closing of the artery causes the fluttering noise....an arterial fart, if you will