Cardiac Dysrhythmias Test Questions and Answers – Distinction Rated | Verified 2026

Cardiac Dysrhythmias Test Questions And Answers
– Distinction Rated
6 questions for EKG analysis Correct ans - -Is it regular?
-Does every P have a QRS and does every QRS have a P?
-What is the Rate?
-Is the PR interval WNL?
-Is the QRS WNL?
-Is the ST segment prolonged, short or elevated?

Normal heart rate Correct ans - 60-100 bpm

Normal PR interval length Correct ans - 0.12-0.20 sec

1 small box on the EKG is Correct ans - 0.04 sec

1 big box is on the EKG is Correct ans - 0.20 sec

30 big boxes on the EKG are Correct ans - 6 sec

To determine HR on the EKG Correct ans - count the R waves in 6 sec
and multiply by 10

Normal QRS length Correct ans - < 0.12 or equal to 0.12

Normal ST segment Correct ans - 0.08 to 0.12, not elevated

Normal sinus rhythm Correct ans - -regular
-every P has wa wQRS
-rate w70 wbpm
-PR winterval wis w0.20, wWNL
-QRS w length w is w 0.04 w WNL
-ST w segment w is w 0.08, w WNL

Sinus w Tachycardia Correct wans - w -regular
-every wP whas wa wQRS
-rate w 140 w bpm w (high)
-PR winterval wis w0.12, wWNL
-QRS w length w is w 0.04 w WNL
-ST w segment w is w 0.08, w WNL
TX: wonly wif wsymptomatic, wtreat wunderlying wcause

Sinus w Bradycardia Correct wans - w -regular
-every wP whas wa wQRS
-rate w<60 wbpm



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, -PR wWNL
-QRS w length w WNL
-ST wsegment wis wWNL
TX: wonly wif wsymptomatic, wIV watropine wor wisoproterenol, wand/or
wpacemaker


Premature wAtrial wBeat Correct wans - w Result wof wan wirritable
wectopic welectrical wimpulse wfrom wwith win wthe watria wis winitiated
wearly.
-Rhythm: w irregular
-every w P whas w a wQRS w - w no wthere wwill w be wextra w p w waves, wsome wmay
w be w hidden
-rate w- wcan wbe wWNL, w<60, wor w>100
-PR wWNL
-QRS w length w WNL
-ST wsegment wis wWNL
TX: wUsually wrequires wno wtreatment, wteach wreduce walcohol, wcaffeine
wintake, wstress, wand wsmoking. wMD wmay wRX wbeta wblocker.


Paroxysmal wSupraventricular wTachycardia w(PSVT) Correct wans -
w - wRhythm: wregular
-every wP whas w a wQRS w- wno, w P wwaves woften w not widentifiable
-rate w - w can w be w 100-280bpm w (most w often w 150-200bpm)
-PR w interval w - w not w measurable
-QRS w length w - w 0.6-0.10 w WNL
-ST wsegment wmay wbe wdifficult wto wdistinguish
TX: wtreat wif wsymptomatic, wvagal wmaneuvers, wO2, wadenosine, wbeta
wblocker, wtemp. wpacing, wsynchronized wcardioversion.


Atrial wFlutter Correct wans - w -Rhythm: wregular w(may wvary
wdepending won wAV wconduction)
-every wP whas wa wQRS w- wno, w2:1, w4:1, w6:1
-rate w- wAtrial: w240-360, wVentricular wvaries, wusually w<150bmp
-PR w interval w - w not w measurable
-QRS w length w - w WNL
-ST w segment w and w T w waves w are w not w identifiable
TX: wSynchronized wcardioversion, wmedication wto wslow wventricular
wresponse wsuch was wbeta wblockers, wCa wchannel wblockers, wfollowed wby
wa wclass wI wantidysrhythmic wagent wor wamiodarone.


Atrial wFibrillation Correct wans - w -Rhythm: wirregularly wirregular
-every w P w has w a w QRS w - w variable
-rate w- watrial w300-600 w(to wrapid wto wcount), wventricular w100-180bpm win
wuntreated wclients
-PR w interval w - w not w measurable
-QRS w length w - w WNL
-ST w segment w - w slight w depression
TX: wSynchronized wcardioversion, wmedication wto wslow wventricular wrate:
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