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Clinical Case 5 - Page 2 (view source)
Revision as of 17:03, 24 February 2011
, 17:03, 24 February 2011no edit summary
Mikey was admitted for an electrocardiogram, echocardiography and thoracic radiographs. The ECG is shown below:
Mikey was admitted for an electrocardiogram, echocardiography and thoracic radiographs. The ECG is shown below:
ECG recording in lead II 25mm/sec 10mm/mV
*Click [[Clinical Case 5 - Page 3|here]] to see a close up image under the x10 objective.
[[Image:Clinical Case 5 02.jpg|thumb|center|500px|(Courtesy of C. Antonczyk)]]
[[Image:Clinical Case 5 03.jpg|thumb|center|500px|(Courtesy of C. Antonczyk)]]
In order to reveal an answer, highlight the underlined or bulleted area using your mouse.
The number of bullet points doesn't necessarily indicate a strict number of answers.
For what reason might you perform an ECG?
*<font color="white"> In order to diagnose a rhythm disturbance. </font>
What is the average heart rate on the first half of this ECG?
*<font color="white"> This recording is 25mm/sec, so 25 of the small boxes represent a second and 5 of the larger boxes represent a second. If you count the number of beats starting from the first thick line over the following 4 seconds (20 of the larger squares) you get 15 beats. So in 4 seconds there were 15 beats. Hence in one minute there will be 15x15 beats. The average heart rate is 225 beats per minute. </font>
Can you see any P waves? Why do you think this might be?
*<font color="white"> No. This dog has atrial fibrillation. P waves are absent. </font>
On the first half of the ECG, why does the 6th complex look different to the rest?
*<font color="white"> This complex is wider than the others indicating that it is of ventricular origin. It is a ventricular premature complex (VPC)</font>
On the second part of the ECG, what do we call the series of abnormal complexes?
*<font color="white"> This is a run of VPCs. As there are more than three in succession, this is called ventricular tachycardia. </font>
Click [[Clinical Case 5 - Page 3|here]] to see the results of the ultrasound.
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