Prehospital 12-lead EKG acquisition and acute coronary syndrome recognition concepts tested on paramedic certification exams.
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- Where is the V1 electrode placed in a 12-lead EKG?
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4th intercostal space, right sternal border- Where is the V2 electrode placed in a 12-lead EKG?
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4th intercostal space, left sternal border- Where is the V3 electrode placed in a 12-lead EKG?
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Midway between V2 and V4- Where is the V4 electrode placed in a 12-lead EKG?
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5th intercostal space, left midclavicular line- Where is the V5 electrode placed in a 12-lead EKG?
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Left anterior axillary line, level with V4- Where is the V6 electrode placed in a 12-lead EKG?
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Left midaxillary line, level with V4 and V5- Where is the RA (right arm) limb electrode placed?
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On the right arm or right shoulder- Where is the LA (left arm) limb electrode placed?
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On the left arm or left shoulder- Where is the LL (left leg) limb electrode placed?
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On the left leg- What is the purpose of the V4R lead?
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To detect right ventricular infarction- How is the V4R electrode positioned relative to V4?
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In the mirror-image position on the right side of the chest (5th intercostal space, right midclavicular line)- What is the purpose of posterior leads V7 through V9?
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To detect posterior wall myocardial infarction, which the standard 12 leads can miss- Standard EKG paper speed is ____.
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25 mm/sec- Standard EKG calibration is ____.
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10 mm/mV- How much time does one small box on EKG paper represent?
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0.04 seconds (40 ms)
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