PhysioLec: Cardiac Electrophysiology Flashcards
TRUE OR FALSE: Increasing the slope of phase 4 will produce tachycardia.
True
TRUE OR FALSE: The AV node has the slowest conduction velocity
True
TRUE OR FALSE: The slow response has a stable RMP.
False
TRUE OR FALSE: In a first degree heart block, the purkinje will become the pacemaker
False
TRUE OR FALSE: Increased in K+ conductance leads to bradycardia
True
TRUE OR FALSE: The lesser the rhythmicity, the less likely it would become the pacemaker.
True
TRUE OR FALSE: The final repolarization is due to K+ efflux
True
TRUE OR FALSE: It would be more beneficial to stimulate cardiac activity if stimulated at the supranormal period.
False
TRUE OR FALSE: During fever, the heart rate is faster.
True
TRUE OR FALSE: Phase 0 of the fast response is due to massive Na+ influx.
True
TRUE OR FALSE: Fast response action potential is exhibited by AV node
False
TRUE OR FALSE: The Slow response action potential has an absent phase 1.
True
TRUE OR FALSE: Depolarization goes from epicardial to endocardial.
False
TRUE OR FALSE: The depolarization of the slow response is due to voltage-gated Na+ channel opening.
False
TRUE OR FALSE: At a threshold potential of –30mV, it will produce tachycardia.
False
TRUE OR FALSE: The colder the core body temperature, the slower the heart rate.
True
TRUE OR FALSE: Fast response is exhibited by atrial muscles.
True
TRUE OR FALSE: The plateau is due to Ca++ efflux.
False
TRUE OR FALSE: In the slow response, an increased RMP will produce bradycardia.
False
TRUE OR FALSE: The fast response action potential has a plateau phase.
True
