NYU EKG Test Questions & Detailed Explanations
Most severe block is.... Right Ans - in left ventricle
Sympathetic NS Right Ans - fight or flight
-SA node increases firing of impulses
Parasympathetic NS Right Ans - rest and digest
-vagal nerve
2 types of cardiac cells Right Ans - -electrical cells
-myocardial cells
Electrical cells (characteristics) Right Ans - -automaticity
-excitability
-conductivity
Automaticity Right Ans - cell's ability to spontaneously generate
impulses
Excitability Right Ans - cells ability to receive and respond to an
impulse
Conductivity Right Ans - ability to receive impulse and send to
someone else
P wave Right Ans - atrial depolarization
-made by the SA node in atria
QRS complex Right Ans - ventricular depolarization
Repolarization Right Ans - relaxation
-chambers fill with blood
-atrial and ventricular happen at the same time
, -we don't see a wave associated with atrial
T wave Right Ans - ventricular repolarization
Impulse rates Right Ans - -SA node: 60-100 bpm
-AV node: 40-60 bpm
-purkinje fibers (ventricles): 20-40 bpm
Where is SA node found Right Ans - right atrium
Where are purknje fibers found Right Ans - ventricles
Relative refractory period Right Ans - starts at the t wave
-period after firing where other impulses can be noticed
-a sudden change during this period on the t wave can put you in a
fatal arrythmia
ECG graph paper Right Ans - -each box= 0.04 sec
-5 boxes = 0.2 sec
Placing leads Right Ans - place on clean chest
-shave chest if patient allows
-do not use alcohol- dries out skin
-do not use cavalon- forms barrier between lead and skin
Steps in analyzing rhythm strips Right Ans - -determine
regularity
-calculate rate
-identify p waves
-measure PR interval
-identify P:QRS ratio
-measure QRS duration
Determining regularity Right Ans - look at R
Most severe block is.... Right Ans - in left ventricle
Sympathetic NS Right Ans - fight or flight
-SA node increases firing of impulses
Parasympathetic NS Right Ans - rest and digest
-vagal nerve
2 types of cardiac cells Right Ans - -electrical cells
-myocardial cells
Electrical cells (characteristics) Right Ans - -automaticity
-excitability
-conductivity
Automaticity Right Ans - cell's ability to spontaneously generate
impulses
Excitability Right Ans - cells ability to receive and respond to an
impulse
Conductivity Right Ans - ability to receive impulse and send to
someone else
P wave Right Ans - atrial depolarization
-made by the SA node in atria
QRS complex Right Ans - ventricular depolarization
Repolarization Right Ans - relaxation
-chambers fill with blood
-atrial and ventricular happen at the same time
, -we don't see a wave associated with atrial
T wave Right Ans - ventricular repolarization
Impulse rates Right Ans - -SA node: 60-100 bpm
-AV node: 40-60 bpm
-purkinje fibers (ventricles): 20-40 bpm
Where is SA node found Right Ans - right atrium
Where are purknje fibers found Right Ans - ventricles
Relative refractory period Right Ans - starts at the t wave
-period after firing where other impulses can be noticed
-a sudden change during this period on the t wave can put you in a
fatal arrythmia
ECG graph paper Right Ans - -each box= 0.04 sec
-5 boxes = 0.2 sec
Placing leads Right Ans - place on clean chest
-shave chest if patient allows
-do not use alcohol- dries out skin
-do not use cavalon- forms barrier between lead and skin
Steps in analyzing rhythm strips Right Ans - -determine
regularity
-calculate rate
-identify p waves
-measure PR interval
-identify P:QRS ratio
-measure QRS duration
Determining regularity Right Ans - look at R
