Cardiac Electrophysiology Flashcards
Represents ATRIAL DEPOLARIZATION
P wave
INITIAL DEPOLARIZATION of ventricles
PR interval
depends on CONDUCTION VELOCITY through AV node
decreased — (increased conduction velocity through AV node) — SYMPA
increased — (decreased conduction velocity through AV node) — PARA
decrease AV nodal conduction (HEART BLOCK) — INCREASE PR interval
DEPOLARIZATION of VENTRICLES
QRS complex
ENTIRE PERIOD OF DEPOLARIZATION and REPOLARIZATION of venrtricles
QT interval
PERIOD when VENTRICLES are DEPOLARIZED
ISOELECTRIC
ST segment
Ventricular REPOLARIZATION
T wave
HYPOKALEMIA
increased amplitude/width of p waves
flat/inverted t waves
u wave
HYPERKALEMIA
low p waves
tall t waves
HYPOCALCEMIA
PROLONGED QT interval
HYPERCALCEMIA
SHORTENED QT interval