UCLA PARAMEDIC PREP : ECG EXAM 2025 QUESTIONS AND ANSWERS

UCLA HEALTH EKG EXAM 2025
QUESTIONS AND ANSWERS


SA node rate - ....ANSWER ...-60-100 bpm


AV node rate - ....ANSWER ...-40-60 bpm


purkinje fibers rate - ....ANSWER ...-20-40 bpm


order of conduction in the heart - ....ANSWER ...-SA node, internodal

pathways, AV node, bundle of His, bundle branches, purkinje fibers


which lead is the best to capture atrial picture activity? - ....ANSWER ...-lead

II




it runs RA to LL and has a tall R wave and clear P wave


what is the default precordial lead? - ....ANSWER ...-lead I




distinguishes wide QRS



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, where is V1? - ....ANSWER ...-right sternal boarder, 4th intercostal space


where is V2? - ....ANSWER ...-left sternal boarder, 4th intercostal space


where is V4? - ....ANSWER ...-midclavicular line and 5th intercostal space


how much time is in small box? - ....ANSWER ...-0.04 seconds


how much time is in big box? - ....ANSWER ...-0.20 seconds


how do you calculate the ventricular rate on an EKG? - ....ANSWER ...-

count the R waves in a 6 second strip and multiply by 10

where do you measure the PR interval? what is a normal PR interval? -

....ANSWER ...-beginning of P until beginning of QRS




0.12-0.2 is normal


what is a normal QRS complex? - ....ANSWER ...-0.04-0.12 seconds


how do you measure the ST segment? - ....ANSWER ...-from the end of the

QRS to the beginning of the T wave

how do you measure the QT interval> what is a normal QT interval? -

....ANSWER ...-beginning of QRS to end of T wave




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