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HOW TO READ AN ECG (STEP 11: T wave (High amplitude T waves, Abnormal T…

- - - - no logical relation between P# and QRS#
        
        Third degree AV block- Complete heart block
      - P# > QRS# (second degree AV block)
        
        progressively lengthening PR--> pause
        
        Mobitz type I (Wenckebach)
        
        intermittent failure of conduction of P wave w/o changes in preceding PR or RR intervals
        
        Mobitz type II
      - P# = QRS# , regular
        
        PR normal
        
        sinus bradycardia
        
        PR>0.22s
        
        First degree AV block
    - - a pause that is a multiple of the P-P interval
        
        SA block
      - no particular relation between PP intervals during pause and PP intervals after/before pause
        
        sinus arrest
  - - - regular
        
        sinus tachycardia
        
        AVNRT: HR=170-180, RR intervals equal
        
        typic: goes up fast lane: short PR and P u. hidden in QRS
        
        atypic: goes up slow lane: PR long and P negative in D2, D3, aVF
        
        AVRT
        
        Pre-excitation (Wolf-Parkinson-White): short PR, delta wave at beginning of QRS, P completely normal
        
        Orthodormic AVRT: retrograde P (-) after QRS, no delta wave
        
        Antidormic AVRT: delta wave, p rarely seen,
        
        Atrial flutter: p waves sawtooth pattern, p +/- depending on macroreentry route
        
        Atrial tachycardia
      - irregular
        
        Atrial fibrillation: p waves absent
    - - regular
        
        V Tach: 4 or more PVCs and HR>100bpm; wide QRS, non clear P wave
        
        sustained: lasting more than 30s OR causing hemodynamic complications
        
        non sustained
      - irregular
        
        V Fibrillation
- - - - SV1 + RV6 > 35 mm