NURS 375 EXAM 2 DYSRHYTHMIAS EXAM QUESTIONS AND
CORRECT ANSWERS
cardiac conductions system CORRECT ANSWERS✓✓SA --> Bachmann bundle --> internodal pathways -->
AV --> BOH --> purkinje
p wave CORRECT ANSWERS✓✓atria depolarization (contraction)
QRS complex CORRECT ANSWERS✓✓ventricular depolarization (contraction)
T wave CORRECT ANSWERS✓✓ventricular repolarization (atrial relaxation)
normal PR interval CORRECT ANSWERS✓✓0.12-0.20
normal QRS complex CORRECT ANSWERS✓✓0.04-0.12
if a T wave is not returned to baseline, what could be indicated? CORRECT ANSWERS✓✓blockage
how often should electrodes be replaced CORRECT ANSWERS✓✓daily
what may be indicated by a wandering baseline? CORRECT ANSWERS✓✓respiratory interference
lead V1 diagnoses _________ CORRECT ANSWERS✓✓wide QRS complex
lead II diagnoses _______ CORRECT ANSWERS✓✓atrial activity and measures HR
hyperkalemia will cause : CORRECT ANSWERS✓✓peak T waves, symptomatic bradycardia, widened QRS
complex
, hypokalemia will appear: CORRECT ANSWERS✓✓PVC , bradycardia, v tach
what should be done for a hyperkalemic pt? CORRECT ANSWERS✓✓K sparing diuretic, fluid overload,
renal failure (cannot get rid of urine)
Give IV insulin, with IV dextrose to decrease hypoglycemia risk
Can give diuretics if healthy kidneys
Dialysis via access port if possible
Albuterol to increase K uptake
Calcium to keep heart calm
what should be done for a pt with hypokalemia CORRECT ANSWERS✓✓Give K to fix it (slowly, as It can
burn IV)
hypomagnesemia appearance on EKG CORRECT ANSWERS✓✓widened QRS
hypercalcemia on an EKG CORRECT ANSWERS✓✓depressed ST segment
hypocalcemia on an EKG CORRECT ANSWERS✓✓elevated ST segment
hyperthyroidism is shown by what type of rhythm? CORRECT ANSWERS✓✓sinus tachycardia
hypothyroidism is shown by what type of rhythm? CORRECT ANSWERS✓✓sinus bradycardia
tiny blocks on EKG paper = CORRECT ANSWERS✓✓0.04 secs
Big block on EKG paper = CORRECT ANSWERS✓✓0.20 secs
if p waves are absent, what problem is occurring? CORRECT ANSWERS✓✓atria not working
CORRECT ANSWERS
cardiac conductions system CORRECT ANSWERS✓✓SA --> Bachmann bundle --> internodal pathways -->
AV --> BOH --> purkinje
p wave CORRECT ANSWERS✓✓atria depolarization (contraction)
QRS complex CORRECT ANSWERS✓✓ventricular depolarization (contraction)
T wave CORRECT ANSWERS✓✓ventricular repolarization (atrial relaxation)
normal PR interval CORRECT ANSWERS✓✓0.12-0.20
normal QRS complex CORRECT ANSWERS✓✓0.04-0.12
if a T wave is not returned to baseline, what could be indicated? CORRECT ANSWERS✓✓blockage
how often should electrodes be replaced CORRECT ANSWERS✓✓daily
what may be indicated by a wandering baseline? CORRECT ANSWERS✓✓respiratory interference
lead V1 diagnoses _________ CORRECT ANSWERS✓✓wide QRS complex
lead II diagnoses _______ CORRECT ANSWERS✓✓atrial activity and measures HR
hyperkalemia will cause : CORRECT ANSWERS✓✓peak T waves, symptomatic bradycardia, widened QRS
complex
, hypokalemia will appear: CORRECT ANSWERS✓✓PVC , bradycardia, v tach
what should be done for a hyperkalemic pt? CORRECT ANSWERS✓✓K sparing diuretic, fluid overload,
renal failure (cannot get rid of urine)
Give IV insulin, with IV dextrose to decrease hypoglycemia risk
Can give diuretics if healthy kidneys
Dialysis via access port if possible
Albuterol to increase K uptake
Calcium to keep heart calm
what should be done for a pt with hypokalemia CORRECT ANSWERS✓✓Give K to fix it (slowly, as It can
burn IV)
hypomagnesemia appearance on EKG CORRECT ANSWERS✓✓widened QRS
hypercalcemia on an EKG CORRECT ANSWERS✓✓depressed ST segment
hypocalcemia on an EKG CORRECT ANSWERS✓✓elevated ST segment
hyperthyroidism is shown by what type of rhythm? CORRECT ANSWERS✓✓sinus tachycardia
hypothyroidism is shown by what type of rhythm? CORRECT ANSWERS✓✓sinus bradycardia
tiny blocks on EKG paper = CORRECT ANSWERS✓✓0.04 secs
Big block on EKG paper = CORRECT ANSWERS✓✓0.20 secs
if p waves are absent, what problem is occurring? CORRECT ANSWERS✓✓atria not working
