Find-your-own Animation part 2
You guys found some great animations for the cardiac cycle!
Now, browse the Web for some animations of either a pressure-volume loop, or a Wiggers Diagram. These are probably a little harder to find. Again, share the link, what you learned, and what you like / dislike. And you need to post a link not posted in the comments above you.
15 comments:
Link to animation: http://omaha.physiol.arizona.edu/Physiology485/Gore/Lecture10/Lect10Figs/PVLoopAnimation.html
Link to cooresponding information:http://omaha.physiol.arizona.edu/Physiology485/Gore/Lecture10/HeartPump.html
I was not overly impressed with the animation, because it did not really add a lot of new information, it just showed the direction of the pressure-volume loop, and if you knew that it went in a counterclockwise circle, then it did not add anything new. However, the page previous to the animation, went into great detail about each phase of a heart beat and how it relates to the pressure-volume pump, and also provided background information on the heart, stages of the cardiac cycle, and also provided an animation of the hear contracting and other Wiggers diagrams. Overall, I liked the information provided by the site, even if the animation was not amazing.
http://www.cvphysiology.com/Cardiac%20Function/PV%20loop%20animation.gif
The image is similar to the one from class, except the top graphic has two charts for LVP and LVV (left ventricle pressure and left ventricle volume, respectively), all in accordance to the ECG and in relation to S1 and S2 (the two shaded columns). The lowest chart in the graphic is the Stroke Volume chart, except the cycle starts right at atrial systole. What's different about this whole graphic is that, unlike in class, this it features the ECG. I'm not too familiar with ECGs, but enough to know that an ECG spike is in relation to a higher voltage signal telling the heart to pump. The peak is right at the beginning of S1, when the the ventricles are being stimulated the most to pump blood out. Further along, it appears that the signal gives a small bump at the maximum ventricle pressure, though I cannot infer whether or not that is telling the heart to go into isovolumic ventricular pressure. I like this chart because it shows the ECG, which I believe we will be talking in the next few classes.
http://library.med.utah.edu/kw/pharm/hyper_heart1.html
This is a very straightforward animation that links the Wiggers diagram to the cardiac cycle. I liked how basic this image was - it really put things in perspective for me, however, I wasnt very pleased with the lack of quality graphically. I feel like this was done in MS Paint and it sort of takes away from complexity of the heart. All in all, a very good diagram and very useful for those who are slightly confused about the Cardiac cycle and the Wiggers diagram.
http://sprojects.mmi.mcgill.ca/cardiophysio/EKGwiggers.htm
This image is much like the one we viewed in class today. Although the chart is a bit more cramped, it actually has a lot of the information that we covered today in class today but it also incorporated something I believe we are learning in class on Tuesday, EKG. EKG (electrocardiogram which is also abbreviated as ECG) is located at the bottom of the graph. From what I have gathered from other parts of the site is that EKG is a voltmeter that uses 12 different electrodes placed throughout the body to measure the electrical activity of the heart. The site later goes into more detail explaining what each wave on the EKG represents. Overall, I found this site to be very interesting and clear.
http://athome.harvard.edu/programs/hse/video/hse2_2_module.html
So I found it rather difficult to find a good animation either because links would take me to animations already posted or to less advanced versions. This diagram I like because it shows the pressure in conjunction with the heart (while actually showing the heart pumping) and allows the viewer to get a sense of ALL the actions working together at the same time.I like that the diagram also shows where s1 and s2 fall into place, instead of having to just figure it out and remember it. I think that the animation could have been a little more complex and less simplistic looking (examp better graphics).The animation is neat in the sense that you can either watch it go through the cycle real time or slow it down and view it step by step.
http://www.pharmacology2000.com/cardiac/cardiac1.htm
I liked this link a lot because it showed the clear ways the blood moves . I learned that as the blood is passing through each point that was labeled in the similar diagram in class, what happens to the heart. I learned that as blood goes down at 120ml of blood volume and the pressure goes up from 80 to 120mm, the Mitral Valve closes and the Aortic Valve opens. I really liked this diagram because it shows clearly what is going at each point of volume and pressure. It's simple and clear. What I dislike about is, it does not have the points labeled, where each process/cycle begins and ends.
http://www.interactivephysiology.com/demo/systems/buildframes.html?cardio/cardcycl/01
This link shows a beating heart on the left side and on the right, an animated chart to show the pressure changing as the heart beats. It shows the left ventricular pressure changing as the heart beats. This helped me to learn how to search for animations online and also what the blood in the heart looks like with and without pressure.
What I enjoyed about this animation was one was able to look at the heart, where the blood is located and watch the pressure increase and decrease. I dislike the fact that the animation moves so quickly.
http://omaha.physiol.arizona.edu/Physiology485/Gore/Lecture10/HeartPump.html
Here is a link to a a professor's lecture and I think the information is pretty thorough for students to understand the whole cardiac process. Although the figures are not too fancy, each one is a clear reflection of the lecture.
I was pretty confused with the pressure-volume loops graphs in class because it is 2 dimentional but after reading the lecture on this site, I got a better understanding of how the systolic and diastolic phases are reflected in the graph, and how the circular motion of the graph reflects the pressure changes.
http://www.blobs.org/science/article.php?article=6
I really liked this animation because it includes a lot of details on each step and is very specific. It adds alot more to my knowledge of what we learned in class. There were some things I missed in lecture and didn't quite understand on thursday so for the last clicker question on "how we are doing," I picked the one where it says "i'm lost." But after this diagram I feel that I'm able to grasp the information at a better angle. At first I wasn't quite sure on what was happening at each step during the cardiac cycle(in lecture) except for the name of each phase. But this diagram offers a description next the each step which was really cool for me.
http://advan.physiology.org/cgi/content/full/31/2/186
This is a link to the article where I found the image of the Wiggers Diagram. I like how I found this article before I found the Wiggers Diagram because it is an article on how students are taught about the heart. It relates to exactly what we are learning about. There are simple pictures of blood flow through the heart and other images that deal with presure. Here is the image of the Wiggers Diagram:
http://advan.physiology.org/cgi/content/full/31/2/186/F4
I personally like the image that we were shown in class.
http://www.andromeda-interactive.co.uk/prod/tcc.htm
This animation is small, but extremely interesting. It shows an animation of a heart contracting and going through the cardiac cycle, and also a Wiggers diagram. It shows how the contractions/relaxations of the heart correspond to the increased pressure or volume of the Wiggers diagram. Extremely helpful to get how these two diagrams correlate.
Pressure volume-loop animation link:
http://www.pharmacology2000.com/cardiac/cardiac1.htm
Like the diagram from class, this animation shows what is happening to the valves at different points along the cardiac cycle. In addition, this animation lists which part of the cardiac cycle the blood is at, while traveling in the counter-clockwise direction. It also shows where the diastolic and systolic volumes end. One thing I don't like about this animation is how you have to wait for the whole cycle to complete itself, before you can see one part of the information again. However, the rest of this page is filled with useful information, which is good for clarification.
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