Describe and interpret this ECG.
[expand title=”Interpretation”]
Rate:
Atrial = 280 min-1
Ventricular = 91 min-1
Rhythm:
Atrial flutter with variable 2:1 and 4:1 block
P waves:
Duration = 60 ms
Amplitude = 0.1 mV
PR interval:
Duration = 120 ms
Morphology = Normal
QRS complex:
Duration = 76 ms
Axis = 68°
Q Waves:
III
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 = 140 ms
Morphology = Normal
T waves:
Duration = 140 ms
Morphology = Normal
QT interval:
QT duration = 388 ms
QTc duration = 477 ms
Additional comments:
Nil
Interpretation: This ECG shows atrial flutter with variable block. She had been referred in by her GP for management of atrial fibrillation, identified by her cardiologist some 6 weeks previously. She was on no medications.
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