Lecture 29 - EKG Basics Cont Flashcards
Bradycardia is HR < ___ BPM and Tachycardia is HR > ___ BPM.
50
100
Prolongation of the PR interval beyond 1 big box indicates ___ degree heart block. When it takes 2 or 3 P waves to initiate a QRS complex, this is a ____ degree heart block. When the P-R interval becomes progressively Longer until a QRS complex is dropped and the process repeats, this is a _______ phenomenon. If the QRS complex is periodically dropped WITHOUT P-R interval lengthening, this is a ____ II block. A ____ degree block is indicated by complete dissociation of the P and QRS waves (typically interference in the His-Purkinje system).
1st degree
2nd degree
Wenckebach phenomenon
Mobitz II block
3rd degree block
Ischemia –> ___ wave inversion in leads V__ through V___ and ST _____.
Injury –> ST ____
Necrosis –> ___ wave in lead II
T wave inversion in leads V2 through V6 and ST DEPRESSION
ST ELEVATION
Q wave in lead II
When ST is elevated in ALL leads, think ______ rather than infarction.
Pericarditis
ST depression is only indicative of Ischemia if it flattens out for 1-2 ____.
Boxes
Which is more appropriate for determining acuteness of an MI, presence of pathologic Q wave or ST elevation/depression and T wave inversion?
ST elevation/depression and T wave inversion
Permanent heart block can occur following acute MI of the LAD. How does this compare to acute MI of the RCA?
Acute MI of the RCA causes TRANSIENT AV node heart block
Hyper_____, beta blockers, ____ channel blockers, and _____ intoxication are all causes of FIRST degree heart block.
Hyperkalemia
Calcium channel blockers
Digitalis
Right bundle branch block is indicated by wide QRS, a secondary ____ wave, and ___ wave discordance (Opposite direction of the R wave).
R wave
T wave
If lead I and aVL are Positive, and leads II, III, and aVF are Negative, this indicates what?
Left anterior hemi-block (Note: the opposite relationship indicates Posterior)
