Cardiac Dysrhythmias Part 2 Questions and Answers
100% Accuracy
1st Heart Block characteristics
-prolong PR interval >.20 on EKG.
-pt. asymptomatic
1st Heart Block causes
MI, CAD, rheumatic fever, hyperthyroid, electrolyte, vagal stimulation, drugs (dig,
BETAS, CCB's, Flecainide)
1st Heart Block treatments
no tx. monitor for changes
2nd Heart Block Type 1 characteristics
-PR interval progressively gets longer until QRS drops, then repeat
-going, goingg, goinggg, gone
2nd Heart Block Type 1 causes
-dig and Betas
-after heart attack
-CAD
-other cardiac issues
2nd heart block type 1 treatment
-atropine
-temp pacemaker if had MI
2nd heart block type 1 pt teach
s/s- fatigue, SOB, dizzy, confused, decreased cardiac output
-may be asymptomatic
-may progress to 2nd
2nd heart block type II characteristics
-PR interval constant but QRS complex drop every 2nd, 3rd, or 4th beat or vary
2nd heart block type II causes
, - rheumatic heart disease
-CAD
-anterior MI
-drug toxicity (Prodysrythmias)
2nd heart block type II treatment
-temp pacemaker, or permanent pacemaker if pt. symptomatic (hypotension, angina)
2nd heart block type II pt teaching
2:1 block worse then a 4:1 block.
-pt symptomatic due to decreased HR
-may progress to 3rd
3rd heart block characteristics
-No correlation between atrial and ventricular contraction (P&QRS)
-Wide QRS complex coming from ventricles
3rd heart block causes
-heart disease
-CAD and MI
-myocarditis
-cardiomyopathy
-amyloidosis and scleroderma
-meds (dig, B blockers, CCB's)
3rd heart block treatments
-need pacemaker
-atropine, dopamine, epi until pacemaker is in
Premature Ventricular Contractions
-wide, disorter occurs early before next scheduled beat.
-ecotopic beat which comes from ventricle
PVC causes
-caffeine, alcohol, nicotine, aminophylline, epi, dig, isoproterenol, electrolyte imbalance,
hypoxia, fever, exercise, heart disease
PVC treatment
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