An ECG provides information about a. cardiac output, b. movement of the excitation wave across the heart, c. coronary circulation, d. valve impairment.

Video transcript

Hi, everybody. Let's look at our next question. Which of the following is a medical test that measures the electrical activity of the heart, A echocardiogram, B, electroencephalogram or E E G C electrocardiogram, E C G or D Magnetic Resonance imaging. MRI Well, if you can't remember the difference between these, we have again, as often in science, we have a clue in the words. Choice C is going to be our answer here and we see it's an electrocardiogram. You've got the prefix electro and then you've got cardio in there. And that is indeed a test that measures the electro activity of the heart. Uh You can look at uh the rhythm and detect error, errors in the heart rhythm and other abnormalities or cardiac conditions. But let's look at our other answer choices to understand why they're not correct. The least similar. And the one you're probably least likely to get confused is choice D magnetic resonance imaging which uses magnetic field and radio waves to provide detailed images of the Bonnie any body structure. So it doesn't, it's not specific to any particular structure. We'll look at choice a echocardiogram there. Again, we have that cardio uh and there. So it is a test for the heart. But in that case, it is a test that uses ultrasound images of the heart. So it's an ultrasound or I'll write out the word here, ultrasound image of the heart. So the E C G provides sort of the basic information is the heart beating and its proper rhythm. Are the electrical impulses going as they should or are there items of concern there? And then this is kind of the next level up. It's an actual image of the heart. So you can visualize the structures of the heart and look for problems in a more detailed way, but it's not what we're asking about. So, not a correct answer. And finally, finally, electroencephalogram or E E G, this is a test that records the electro activity of the brain, not the heart. So electrical activity but of the brain. And you would use that to test people. They're having issues with seizures, sleep disorders or brain injuries, but not the right part of the body. So not our answer choice. So again, the medical test that measures the electro activity of the heart choice C electrocardiogram or E C G. See you in the next video.