depolarization - correct answer ✔- inside of cell becomes positive,
| | | | | | | | |
outside negative
| | |
- contraction
|
- na+ channel opens
| | | |
- ELECTRICAL
|
repolarization - correct answer ✔movement of cells = inside is
| | | | | | | | |
negative again
| | |
- na+ channels close, k+ channels open
| | | | | | |
- MECHANICAL
|
p wave | |
qrs wave |
t wave - correct answer ✔- (p) atrial depolarization
| | | | | | | | |
- (qrs) ventricular depolarization
| | | |
- (t) ventricular repolarization
| | |
refractory period - correct answer ✔per of time where cardiac cells
| | | | | | | | | |
cannot respond to stimulus
| | | |
,absolute refractory period - correct answer ✔beginning of qrs to peak
| | | | | | | | | |
of t wave
| | |
relative refractory (vulnerable per of repolarization) - correct answer
| | | | | | | |
✔- cardiac cells have repolarized enough to respond to strong
| | | | | | | | | |
stimulus
| |
- during this per a strong stimulus may overtake the pacemaker of the
| | | | | | | | | | | |
heart
| |
- ex. PVC during vulnerable period may turn into vtach or torsades
| | | | | | | | | | | |
- prolonged QT interval inc possibility
| | | | |
causes of prolonged qt intervals - correct answer ✔haldol,
| | | | | | | |
bradycardia, hypokalemia
| |
automaticity - correct answer ✔ability of pacemaker cells to initiate
| | | | | | | | |
electrical impulse
| |
excitability - correct answer ✔ability of muscle cells to respond to
| | | | | | | | | |
outside stimulus
| |
conductivity - correct answer ✔ability to recieve electrical stimulus
| | | | | | | |
and conduct impulse to adjacent cells
| | | | | |
, contraction - correct answer ✔cardiac cells shorten = muscular
| | | | | | | |
contraction in response to electrical stimulus
| | | | | |
sa node - correct answer ✔- primary pacemaker of heart
| | | | | | | | | |
- 60-90 bpm
| |
av node - correct answer ✔delay = atrial contraction + ventricular
| | | | | | | | | |
filling
| |
- 40-60 bpm
| |
bundle of his - correct answer ✔ability to self initiate electrical activity
| | | | | | | | | | |
|
- 40-60 bpm
| |
purkinje fibers - correct answer ✔network of fibers that carry
| | | | | | | | |
electrical impulse to ventricular muscle cells
| | | | | | |
- 20-40 bpm
| |
NSR |
Brady |
Tachy
SVT |
Junctional |
| | | | | | | | |
outside negative
| | |
- contraction
|
- na+ channel opens
| | | |
- ELECTRICAL
|
repolarization - correct answer ✔movement of cells = inside is
| | | | | | | | |
negative again
| | |
- na+ channels close, k+ channels open
| | | | | | |
- MECHANICAL
|
p wave | |
qrs wave |
t wave - correct answer ✔- (p) atrial depolarization
| | | | | | | | |
- (qrs) ventricular depolarization
| | | |
- (t) ventricular repolarization
| | |
refractory period - correct answer ✔per of time where cardiac cells
| | | | | | | | | |
cannot respond to stimulus
| | | |
,absolute refractory period - correct answer ✔beginning of qrs to peak
| | | | | | | | | |
of t wave
| | |
relative refractory (vulnerable per of repolarization) - correct answer
| | | | | | | |
✔- cardiac cells have repolarized enough to respond to strong
| | | | | | | | | |
stimulus
| |
- during this per a strong stimulus may overtake the pacemaker of the
| | | | | | | | | | | |
heart
| |
- ex. PVC during vulnerable period may turn into vtach or torsades
| | | | | | | | | | | |
- prolonged QT interval inc possibility
| | | | |
causes of prolonged qt intervals - correct answer ✔haldol,
| | | | | | | |
bradycardia, hypokalemia
| |
automaticity - correct answer ✔ability of pacemaker cells to initiate
| | | | | | | | |
electrical impulse
| |
excitability - correct answer ✔ability of muscle cells to respond to
| | | | | | | | | |
outside stimulus
| |
conductivity - correct answer ✔ability to recieve electrical stimulus
| | | | | | | |
and conduct impulse to adjacent cells
| | | | | |
, contraction - correct answer ✔cardiac cells shorten = muscular
| | | | | | | |
contraction in response to electrical stimulus
| | | | | |
sa node - correct answer ✔- primary pacemaker of heart
| | | | | | | | | |
- 60-90 bpm
| |
av node - correct answer ✔delay = atrial contraction + ventricular
| | | | | | | | | |
filling
| |
- 40-60 bpm
| |
bundle of his - correct answer ✔ability to self initiate electrical activity
| | | | | | | | | | |
|
- 40-60 bpm
| |
purkinje fibers - correct answer ✔network of fibers that carry
| | | | | | | | |
electrical impulse to ventricular muscle cells
| | | | | | |
- 20-40 bpm
| |
NSR |
Brady |
Tachy
SVT |
Junctional |
