EXAM 2- BASIC DYSRHYTHMIAS
1. what do you do if artifacts occur on an ECG Ans : check connections in equipment
2. rhythm starts in the SA node, 60-100 BPM, normal conduction pathway Ans : nor-
mal sinus rhythm
3. normal P wave length Ans : .06-.20
4. the time of passive of impulse through the atria, causing atrial depolariza- tion
(atrial contraction) Ans : P wave
5. normal PR interval length Ans : .12-.20
6. time taken for the impulse the spread through the atria, AV node, and bundle of
HIS, bundle branches, & purkinje fibers, right up until ventricular contraction.
(atrial contraction -> beginning of ventricular contraction) Ans : PR interval
7. normal QRS length Ans : <.12
8. time taken for depolarization of both ventricles
(systole- ventricular contraction) Ans : QRS
9. normal ST segment length Ans : .12
10. time between ventricular depolarization and repolarization; should be iso- electric.
(end of systole -> beginning of diastole) Ans : ST segment
11. normal T wave length Ans : .16
12. ventricular relaxation (diastole) Ans : T wave
13. is K or Na higher inside the cell Ans : K
14. is K or Na higher outside the cell Ans : Na
15. what happens with depolarization of a cell Ans : Na influx into cell
16. normal QT Ans : .34-.43
17. time taken for entire depolarization/repolarization of ventricles
(ventricular contraction + relaxation)
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, (ventricular diastole + systole) Ans : QT
18. the ability of a cardiac cell to fire spontaneously without being activated-
Ans : automaticity
19. the ability of a cell to become depolarized; determined by the length of time after
depolarization that they can be restimulated (the refractory periods) Ans : ex-
citability
20. SA node is firing <60 BPM P,
QRS, T all normal
regular rhythm Ans : sinus bradycardia
21. is sinus bradycardia ever normal Ans : yes- it's only significant when symptomatic
22. symptoms of sinus bradycardia Ans : syncope, chest pain, pale/cool skin, hypoten-
sion, weakness, angina, dizziness, confusion, SOB
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1. what do you do if artifacts occur on an ECG Ans : check connections in equipment
2. rhythm starts in the SA node, 60-100 BPM, normal conduction pathway Ans : nor-
mal sinus rhythm
3. normal P wave length Ans : .06-.20
4. the time of passive of impulse through the atria, causing atrial depolariza- tion
(atrial contraction) Ans : P wave
5. normal PR interval length Ans : .12-.20
6. time taken for the impulse the spread through the atria, AV node, and bundle of
HIS, bundle branches, & purkinje fibers, right up until ventricular contraction.
(atrial contraction -> beginning of ventricular contraction) Ans : PR interval
7. normal QRS length Ans : <.12
8. time taken for depolarization of both ventricles
(systole- ventricular contraction) Ans : QRS
9. normal ST segment length Ans : .12
10. time between ventricular depolarization and repolarization; should be iso- electric.
(end of systole -> beginning of diastole) Ans : ST segment
11. normal T wave length Ans : .16
12. ventricular relaxation (diastole) Ans : T wave
13. is K or Na higher inside the cell Ans : K
14. is K or Na higher outside the cell Ans : Na
15. what happens with depolarization of a cell Ans : Na influx into cell
16. normal QT Ans : .34-.43
17. time taken for entire depolarization/repolarization of ventricles
(ventricular contraction + relaxation)
1/9
, (ventricular diastole + systole) Ans : QT
18. the ability of a cardiac cell to fire spontaneously without being activated-
Ans : automaticity
19. the ability of a cell to become depolarized; determined by the length of time after
depolarization that they can be restimulated (the refractory periods) Ans : ex-
citability
20. SA node is firing <60 BPM P,
QRS, T all normal
regular rhythm Ans : sinus bradycardia
21. is sinus bradycardia ever normal Ans : yes- it's only significant when symptomatic
22. symptoms of sinus bradycardia Ans : syncope, chest pain, pale/cool skin, hypoten-
sion, weakness, angina, dizziness, confusion, SOB
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