ECG #1


Interpretation

 

Rate:

Atrial = 75 – 115 min-1

Ventricular = 75 – 115 min-1

Rhythm:

Sinus arrhythmia

P waves:  

Duration = 90 ms

Amplitude = 0.05 – 0.2 mV

PR interval:

Duration = 120 ms

Morphology = normal

QRS complex:

Duration = 94 ms

Axis = 77°

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 = 80 ms

Morphology = normal

T waves:

Duration = 120 ms

Morphology = normal

QT interval:

QT duration = 340 ms

QTc duration = 427 ms

Additional comments:

Nil


Interpretation: There is marked sinus arrhythmia. This can be a normal variant, or a marker of significant obstructive airways disease (there are no right-sided changes to suggest chronic airways disease). In the elderly patient, this could herald the onset of sinus node disease. No clinical details were given with the patient.

 

ECG #13
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