February 07, Heart anatomy overview Heart anatomy is looked from the right side of the supine patient using a median sternotomy incision.
Today I found out how to read an EKG. While some people might say that kind of skill should require 13 years of preparatory school, four years of college, four years of medical school and a specialty in cardiac electrophysiology, I say…Pshaw! If it were, there would be more combustion and potential for speedy projectiles gone awry You know, I bet rocket scientist Christmas parties are really fun…and imagine the Fourth of July company picnics!
This is just cardiology, simple biological pipes and wires. Reading EKGs only seems hard because most cardiologists use long expensive words.
Or, to make a long story short, most healthy hearts pump blood through the body when stimulated by an electrical signal that travels along predetermined pathways. This causes the cardiac cells to contract in just the right order, resulting in a magical four chambered pumping action.
An EKG is a graph thusly named an electrocardiograph tracing the strength and direction of this electrical signal.
Leads equipped with conductive goo are placed on different parts of the body allowing a view of the heart from different angles. If the electrical activity of the heart at any given moment is traveling toward the lead being viewed, the line on the graph goes up positive deflection.
If the electrical activity is traveling away from the lead, the line goes down negative deflection. This graph is being traced by a stylus on a moving piece of graph paper. In a normal healthy heart, an EKG representing one complete heartbeat looks about like this: That first petite little hump, affectionately called the P wave, represents the electrical signal that starts in a group of cells called the Sinoatrial Node.
This signal then travels through the atria the smaller and upper two chambers of the heart causing them to contract and push blood in to the larger and more powerful ventricles below. This delay allows time for the atria to completely deliver their bounty into the Ventricles.
With perfect timing this signal continues through the Bundle of His. The signal splits and speeds along down the left and right bundle branches, making its way to the Purkinje fibers and turning north again.
The larger T wave which then finishes off our heartbeat is the repolarization of the ventricles. Well, the repolarization of the atria is buried in the larger signal of the QRS and therefore not visible on the graph.
This pattern is called normal sinus rhythm. It is the basic EKG of any normal healthy heart.Search and browse our historical collection to find news, notices of births, marriages and deaths, sports, comics, and much more. Heart anatomy is looked from the right side of the supine patient using a median sternotomy incision.
The heart structures which are always seen at this viewpoint encompass the aorta, pulmonary artery, right atrium, right . View Homework Help - crimes of heart AP 2 case study from BIOL at Houston Community College. 1. Dr. Baker spends a long time listening to (auscultating) Calebs heart.
I. Where on the thoracic.
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