Arrhythmias and Myocardial Infarction
ACTUAL QUESTIONS AND CORRECT
ANSWERS
The heart acts as a... - CORRECT ANSWERS Syncytium, cardiac cells
make connections with eachother through specific points of contact
What points of connection do cardiac cells have? - CORRECT ANSWERS
Desosomes and gap junctions
Desosome function - CORRECT ANSWERS link adjacent cells
mechanically
Gap junctions function - CORRECT ANSWERS link cells electrically,
connect cytoplasm of two cells allowing ions and electrical impulses to directly
pass(base of conduction in heart)
Define arrhythmia - CORRECT ANSWERS change in cardiac
rhythm(from normal sinus rhythm)
Irregular heartbeats can occur due to... - CORRECT ANSWERS rate,
rhythm, site of origin, conduction of cardiac electrical impulse
Irregular heartbeats can affect... - CORRECT ANSWERS heart's ability
to pump blood
EKG/ECG function - CORRECT ANSWERS reads electrical current in
heart by summing individual APs to form one electrical reading
, ECG findings do not establish.. - CORRECT ANSWERS specific
diagnosis with the exception of arrhythmias(many noncardiac conditions can
affect readings)
Factors that affect ECGs but still provide normal readings - CORRECT
ANSWERS Age, body habitus, serum electrolyte concentrations
SA node conduction speed & channels responsible - CORRECT ANSWERS
0.05 m/s, IC, IK, If
Atrial pathway conduction speed & channels responsible - CORRECT
ANSWERS 1 m/s, INa, ICa, IK
AV node conduction speed & channels responsible - CORRECT ANSWERS
0.05 m/s, Ica, Ik, If
Bundle of His conduction speed & channels responsible - CORRECT
ANSWERS 1 m/s, INA, ICa, Ik, If
Purkinjie system conduction speed & channels responsible - CORRECT
ANSWERS 4 m/s, INa, ICa, IK, If
Ventricular conduction speed & channels responsible - CORRECT ANSWERS
1 m/s, INa, ICa, IK
ECG waves and intervals - Before P wave - CORRECT ANSWERS SA
node activation
ECG waves and intervals - P wave - CORRECT ANSWERS Atrial
depolarization
ACTUAL QUESTIONS AND CORRECT
ANSWERS
The heart acts as a... - CORRECT ANSWERS Syncytium, cardiac cells
make connections with eachother through specific points of contact
What points of connection do cardiac cells have? - CORRECT ANSWERS
Desosomes and gap junctions
Desosome function - CORRECT ANSWERS link adjacent cells
mechanically
Gap junctions function - CORRECT ANSWERS link cells electrically,
connect cytoplasm of two cells allowing ions and electrical impulses to directly
pass(base of conduction in heart)
Define arrhythmia - CORRECT ANSWERS change in cardiac
rhythm(from normal sinus rhythm)
Irregular heartbeats can occur due to... - CORRECT ANSWERS rate,
rhythm, site of origin, conduction of cardiac electrical impulse
Irregular heartbeats can affect... - CORRECT ANSWERS heart's ability
to pump blood
EKG/ECG function - CORRECT ANSWERS reads electrical current in
heart by summing individual APs to form one electrical reading
, ECG findings do not establish.. - CORRECT ANSWERS specific
diagnosis with the exception of arrhythmias(many noncardiac conditions can
affect readings)
Factors that affect ECGs but still provide normal readings - CORRECT
ANSWERS Age, body habitus, serum electrolyte concentrations
SA node conduction speed & channels responsible - CORRECT ANSWERS
0.05 m/s, IC, IK, If
Atrial pathway conduction speed & channels responsible - CORRECT
ANSWERS 1 m/s, INa, ICa, IK
AV node conduction speed & channels responsible - CORRECT ANSWERS
0.05 m/s, Ica, Ik, If
Bundle of His conduction speed & channels responsible - CORRECT
ANSWERS 1 m/s, INA, ICa, Ik, If
Purkinjie system conduction speed & channels responsible - CORRECT
ANSWERS 4 m/s, INa, ICa, IK, If
Ventricular conduction speed & channels responsible - CORRECT ANSWERS
1 m/s, INa, ICa, IK
ECG waves and intervals - Before P wave - CORRECT ANSWERS SA
node activation
ECG waves and intervals - P wave - CORRECT ANSWERS Atrial
depolarization
