ECG ORIENTATION KAISER NEW EXAM WITH
CORRECT ANSWERS 100% VERIFIED
SA node - ANSWER Sino-atrial node; the pace-maker of the heart; where the impulse
conduction of the heart usually starts; located in the top of the right atrium. 60-100 bpm
AV node - ANSWER (atrioventricular node) region of the heart between the right atrium
and right ventricle from which electrical impulses spread to the ventricles during a
heartbeat. 40-60bpm
bundle of HIS - ANSWER Ability to self initiate electrical activity Rate: 40 - 60 beats per
minutes
REFRACTORY PERIOD - ANSWER the period of resistance to stimulation, cardiac cells
unable to respond to stimulus
relative refractory period - ANSWER cardiac cells have repolarized enough to respond
to strong stimulus
automaticity-ANSWER Ability of pacemaker cells to spontaneously initiate an electrical
impulse, SA node, AV junction, and Purkinje fibers
excitability-ANSWER ability to respond to stimuli
conductivity-ANSWER Ability to receive an electrical stimulus and conduct that impulse
to adjacent cells - all cardiac cells possess this.
contraction-ANSWER Cardiac cells shorten, causing muscular contraction in response
to an electrical stimulus
, DEPOLARIZATION - ANSWER Movement of ions (Na+, Ca+, K+) across cell membrane
causing inside of cell to become more positive, electrical conduction results in
contraction. Na+ channels open. Positive inside, negative outside.
REPOLARIZATION - ANSWER movement of ions across cell membrane where inside of
cell is restored to its negative charge. Sodium channels close. Potassium channels
open. Active transport by sodium-potassium pump
DEPORIZATION - ANSWER ELECTRICAL
CONTRACTION - ANSWER IS MECHANICAL. CONTRACTION FOLLOWS
DEPOLARIZATION.
WHAT OCCUR FIRST? ELECTRICAL CONDUCTION, OR MECHANICAL CONTRACTION?
- ANSWER ELECTRICAL CONDUCTION
P WAVE - ANSWER ATRIAL DEPOLARIZATION
QRS - ANSWER VENTRICAL DEPOLARIZATION
T WAVE - ANSWER ventricular repolarization
Purkinje fibers - ANSWER fibers that carry stimulation throughout the ventricles.
20-40bpm
junctional rhythm HR - ANSWER 40-60bpm
ventricular rhythm - ANSWER 20-40bpm
tachycardia non symptomatic treatment - ANSWER vagal maneuvers, adenosine, BB,
CORRECT ANSWERS 100% VERIFIED
SA node - ANSWER Sino-atrial node; the pace-maker of the heart; where the impulse
conduction of the heart usually starts; located in the top of the right atrium. 60-100 bpm
AV node - ANSWER (atrioventricular node) region of the heart between the right atrium
and right ventricle from which electrical impulses spread to the ventricles during a
heartbeat. 40-60bpm
bundle of HIS - ANSWER Ability to self initiate electrical activity Rate: 40 - 60 beats per
minutes
REFRACTORY PERIOD - ANSWER the period of resistance to stimulation, cardiac cells
unable to respond to stimulus
relative refractory period - ANSWER cardiac cells have repolarized enough to respond
to strong stimulus
automaticity-ANSWER Ability of pacemaker cells to spontaneously initiate an electrical
impulse, SA node, AV junction, and Purkinje fibers
excitability-ANSWER ability to respond to stimuli
conductivity-ANSWER Ability to receive an electrical stimulus and conduct that impulse
to adjacent cells - all cardiac cells possess this.
contraction-ANSWER Cardiac cells shorten, causing muscular contraction in response
to an electrical stimulus
, DEPOLARIZATION - ANSWER Movement of ions (Na+, Ca+, K+) across cell membrane
causing inside of cell to become more positive, electrical conduction results in
contraction. Na+ channels open. Positive inside, negative outside.
REPOLARIZATION - ANSWER movement of ions across cell membrane where inside of
cell is restored to its negative charge. Sodium channels close. Potassium channels
open. Active transport by sodium-potassium pump
DEPORIZATION - ANSWER ELECTRICAL
CONTRACTION - ANSWER IS MECHANICAL. CONTRACTION FOLLOWS
DEPOLARIZATION.
WHAT OCCUR FIRST? ELECTRICAL CONDUCTION, OR MECHANICAL CONTRACTION?
- ANSWER ELECTRICAL CONDUCTION
P WAVE - ANSWER ATRIAL DEPOLARIZATION
QRS - ANSWER VENTRICAL DEPOLARIZATION
T WAVE - ANSWER ventricular repolarization
Purkinje fibers - ANSWER fibers that carry stimulation throughout the ventricles.
20-40bpm
junctional rhythm HR - ANSWER 40-60bpm
ventricular rhythm - ANSWER 20-40bpm
tachycardia non symptomatic treatment - ANSWER vagal maneuvers, adenosine, BB,
