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EP IBHRE ELECTROPHYSIOLOGY STUDY GUIDE 2026 CARDIAC RHYTHM MECHANISMS AND ELECTRICAL SIGNALING REVIEW

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EP IBHRE ELECTROPHYSIOLOGY STUDY GUIDE 2026 CARDIAC RHYTHM MECHANISMS AND ELECTRICAL SIGNALING REVIEW

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EP IBHRE ELECTROPHYSIOLOGY STUDY
GUIDE 2026 CARDIAC RHYTHM
MECHANISMS AND ELECTRICAL
SIGNALING REVIEW


◉ normal HV interval
Answer: 35-55 ms


◉ Normal atrial ERP
Answer: 180-330 ms


◉ Normal AVNERP
Answer: 250-400 ms


◉ Normal VERP
Answer: 180-290 ms


◉ AH measures
Answer: AVN conduction time

, ◉ Curve with AP
Answer: Should see a straight line with decreased A1-A2 CL's (no
decrement) then a "jump" to the AVN conduction


◉ % of people with retrograde conduction
Answer: 75%


◉ SNRT
Answer: Measurement of the SA node automaticity


◉ CSNRT
Answer: SNRT-BCL


◉ When does CSNRT suggest SAN dysfunction
Answer: CSNRT >525 ms


◉ Method for obtaining SNRT
Answer: Electrode near SAN is paced -> Overdrive suppression
pacing for at least 30 seconds -> measure the degree of SAN
suppression


◉ SACT

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