EXAM 2- BASIC DYSRHYTHMIAS
QUESTIONS AND CORRECT
ANSWERS (BASIC A DYSRHYTHMIA)
what do you do if artifacts occur on an ECG? - correct answer ✔✔check connections in
equipment
rhythm starts in the SA node, 60-100 BPM, normal conduction pathway - correct answer
✔✔normal sinus rhythm
normal P wave length - correct answer ✔✔.06-.20
the time of passive of impulse through the atria, causing atrial depolarization (atrial contraction)
- correct answer ✔✔P wave
normal PR interval length - correct answer ✔✔.12-.20
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) - correct answer ✔✔PR interval
normal QRS length - correct answer ✔✔<.12
time taken for depolarization of both ventricles
(systole- ventricular contraction) - correct answer ✔✔QRS
, normal ST segment length - correct answer ✔✔.12
time between ventricular depolarization and repolarization; should be isoelectric.
(end of systole -> beginning of diastole) - correct answer ✔✔ST segment
normal T wave length - correct answer ✔✔.16
ventricular relaxation (diastole) - correct answer ✔✔T wave
is K or Na higher inside the cell? - correct answer ✔✔K
is K or Na higher outside the cell? - correct answer ✔✔Na
what happens with depolarization of a cell? - correct answer ✔✔Na influx into cell
normal QT - correct answer ✔✔.34-.43
time taken for entire depolarization/repolarization of ventricles
(ventricular contraction + relaxation)
(ventricular diastole + systole) - correct answer ✔✔QT
the ability of a cardiac cell to fire spontaneously without being activated - correct answer
✔✔automaticity
the ability of a cell to become depolarized; determined by the length of time after
depolarization that they can be restimulated (the refractory periods) - correct answer
✔✔excitability
QUESTIONS AND CORRECT
ANSWERS (BASIC A DYSRHYTHMIA)
what do you do if artifacts occur on an ECG? - correct answer ✔✔check connections in
equipment
rhythm starts in the SA node, 60-100 BPM, normal conduction pathway - correct answer
✔✔normal sinus rhythm
normal P wave length - correct answer ✔✔.06-.20
the time of passive of impulse through the atria, causing atrial depolarization (atrial contraction)
- correct answer ✔✔P wave
normal PR interval length - correct answer ✔✔.12-.20
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) - correct answer ✔✔PR interval
normal QRS length - correct answer ✔✔<.12
time taken for depolarization of both ventricles
(systole- ventricular contraction) - correct answer ✔✔QRS
, normal ST segment length - correct answer ✔✔.12
time between ventricular depolarization and repolarization; should be isoelectric.
(end of systole -> beginning of diastole) - correct answer ✔✔ST segment
normal T wave length - correct answer ✔✔.16
ventricular relaxation (diastole) - correct answer ✔✔T wave
is K or Na higher inside the cell? - correct answer ✔✔K
is K or Na higher outside the cell? - correct answer ✔✔Na
what happens with depolarization of a cell? - correct answer ✔✔Na influx into cell
normal QT - correct answer ✔✔.34-.43
time taken for entire depolarization/repolarization of ventricles
(ventricular contraction + relaxation)
(ventricular diastole + systole) - correct answer ✔✔QT
the ability of a cardiac cell to fire spontaneously without being activated - correct answer
✔✔automaticity
the ability of a cell to become depolarized; determined by the length of time after
depolarization that they can be restimulated (the refractory periods) - correct answer
✔✔excitability
