Normal Sinus Rhythm
1) origin
2) normal rate
3) wave involved correct answer: --origin is SA node
--normal sinus rate is 60-100/min
--regularly occurring P waves
Sinus Bradycardia correct answer: --rate less than 60/min, RR
Sinus Tachycardia correct answer: --rate more than 100/min
...
ECG PART 2 Questions And Answers
Normal Sinus Rhythm
1) origin
2) normal rate
3) wave involved correct answer: --origin is SA node
--normal sinus rate is 60-100/min
--regularly occurring P waves
Sinus Bradycardia correct answer: --rate less than 60/min, RR
Sinus Tachycardia correct answer: --rate more than 100/min RR
Sinus arrhythmia correct answer: --irregular rhythm that varies with respiration
--all P waves identical
--considered normal
Nonsinus atrial (cornary sinus) rhythm correct answer: --
impulses originate low in atrium; travel retrograde as well as distally
--P waves inverted in leads II, III,, and aVR
Wandering Pacemaker correct answer: --irregular rhythm
--P waves change shape as pacemaker location varies
--rate under 100/min Multifocal Atrial Tachycardia correct answer: ----irregular rhythm
--P waves change shape as pacemaker location varies
--*rate exceeds 100/min*
What is an AV block? correct answer: --blocks that delay or prevent atrial impulses from reaching ventricles
Primary AV Block correct answer: --prolonged PR interval
--PR interval prolonged greater than 1 large box (.2 sec)
Secondary AV Block: Wenckebach (Mobitz 1) correct answer: --PR gradually lengths with each cycle until the last P wave in the series does not produce a QRS (dropped beat)
Secondary AV Block: Mobitz 2 (non-Wenckebach) correct answer: --sudden dropped QRS without prior PR lengthening
--AV block at level of bundle of His or bilateral BB
3rd Degree Block correct answer: --no relationship between P waves & QRS complexes --QRS rate slower than P rate --*P waves are marching through*
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