[expand title=”Interpretation”]
Rate:
Atrial = N/A
Ventricular = 40 min-1
Rhythm:
Junctional bradycardia
P waves:
N/A
PR interval:
N/A
QRS complex:
Duration = 79 ms
Axis = 66°
Q Waves:
Nil
R wave progression:
Normal
LV Hypertrophy [Sokolow; SV1 + (RV5 or RV6) > 35mm) or RI + SIII > 25mm]?
No
RV Hypertrophy [R/S ratio V5 or V6 < 1 or R/S ratio V1 > 1 or S1S2S3 pattern]?
No
ST segments:
Duration = 170 ms
Morphology = elevation II, III, aVF, V4-6; depression I, aVL, V2-3
T waves:
Duration = 180 ms
Morphology = inverted I, aVL
QT interval:
QT duration = 501 ms
QTc duration = 409 ms
Additional comments:
Nil
Interpretation: There is an acute inferolateral MI with reciprocal changes in I and aVL. There is some depression in V2-3, likely reciprocal, but could be the manifestation of some posterior extension. Bradydysrhythmias are common with inferior MI with varying degrees of 2nd and 3rd degree AV blocks, as well as slow nodal rhythms.