Science Quiz / Diagnostic Imaging electrocardiography

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Can you name the electrocardiography questions?

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electrical impulses arise from ectopic foci in ventricles, don't travel through conduction system but through ordinary muscle, slows conduction, results in wide bizarre QRS complex
wave where ventricular depolarization occurs
wave where depolarization of thick ventricular muscle mass occurs
at 50mm/sec each tiny square is __ cm in height and __ cm wide
at 25mm/sec each tiny square is __ cm in height and __ cm wide
this is a cause of rapid, irregular movements of the baseline
major nerve to heart that speeds HR
regular rhythm, P for every QRS wave, intervals have normal values
P waves differ in size within same lead
physiologic property of cardiac muscle: SA node is primary pacemaker but any cells of conduction system can initiate impulses under right circumstances
normal or abnormal (n or a)? PVC/VPC
no ventricular complexes, cardiac arrest, irreversible brain damage results in 3-4 minutes, no peripheral pulse
part of ecg where blood is pouring into the heart, no deflection on ecg tracing, wave of depolarization is at AV node and delays to allow filling of ventricles
wave where ventricular repolarization occurs
wave where depolarization of interventricular septum via bundle of his occurs
rapid HR, irregular chaotic bizarre waves, can't see P, QRS, and T waves, can be large and coarse or small and fine
amplitude of ___ wave = size of ventricular muscle mass
series of PVCs, intermittent (3+) or continuous (all), rate is >100, QRS wide and bizarre, no relation b/w P and QRS, 'big broad wide and bizarre'
HR varies with respirations (increased with inspiration, decreased with expiration)
questionanswerhint
wave where depolarization passes from apex of heart dorsally along purkinje fibers (milks blood out of ventricles into body)
normal or abnormal (n or a)? respiratory sinus arrhythmia
physiologic property of cardiac muscle: cardiac cell has resting potential which is stimulated to 'fire' or 'depolarize', contracts cardiac muscle cell
normal or abnormal (n or a)? bradycardia
part of ecg representing time from beginning of atrial depolarization to beginning of ventricular depolarization
electrical interference pattern from equipment not properly grounded; most common artifact
term for origin of arrhythmia being in atria or AV node
term for electrical activity showing on ECG but no heart beat can be heard, patient near death
physiologic property of cardiac muscle: activation of one muscle cell produces activity in neighboring muscle cells, coordinates cells to pump as a unit
caused by respiratory movement, baseline moves
amplitude of ___ wave = size of atrial muscle mass
physiologic property of cardiac muscle: occurs in response to electrical current, ecg is tool of choice for assessing this
wave where atrial depolarization occurs
major nerve to heart that slows HR
physiologic property of cardiac muscle: after firing, there is a rest time where cell can't be restimulated; allows heart to contract and refill
normal or abnormal (n or a)? tachycardia
part of ecg where there is no electrical activity, shows end of ventricular depolarization to beginning of ventricular repolarization
normal or abnormal (n or a)?: sinus rhythm
normal or abnormal (n or a)? wandering pacemaker

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